Amidst all the hyperbole over short term movements in sterling it is worthwhile looking at the longer trend. Today sterling is around the same level against the Euro as it was at the beginning of 2012. It is almost a fifth higher against the yen, and around one fifth down against the dollar. Over this time period the dollar has been strong against all major currencies, running with higher interest rates and expectations of higher rates than elsewhere in the advanced world. The yen has been particularly weak thanks to negative rates and the creation so many extra yen by the authorities.

One of the odd features of the protracted and often repetitious UK debate about Brexit is the wish of so many to look for weaknesses and problems on the UK side, and to fail to analyse the weaknesses and difficulties on the EU side in the forthcoming talks. On Tuesday I pointed out to the PM during the exchanges on her statement about the EU summit that the questions to be asked need to be asked of the 27.

I began by asking how can a group of civilised democracies that are meant to believe in decent values not reassure British citizens living on the continent legally that they can stay there after exit?  I do not for one moment think the Spaniards will want to evict UK pensioners living in their own villas on the Costa Brava, for example. Nor do I see how they could do so legally. However, why is it asking too much of the EU and the Spanish government not to confirm that of course they are welcome to stay. After all, the UK government has been very clear that we would like all EU citizens legally in the UK to stay as long as they wish, but do need similar confirmation for our citizens on the continent.

I also asked for confirmation that it is clearly in the interests of business and governments on the continent to carry on trading tariff free, with no more barriers than they currently face, once the UK has left. The UK will willingly offer continental countries tariff free access to our market as long as we have the same to theirs. The choice rests with them, as the UK would recommend tariff free but can live with WTO most favoured nation terms.

Whilst we are about it, we should ask the rest of the EU how they intend to implement their Treaty obligation to have good relations with neighbouring states and to promote trade with them. As the EU is always keen to ensure we follow the letter as well as the spirit of the Treaty I assume the same applies on this important issue.

The UK voted to take back control of our laws, our money and our borders. We are doing so based on the referendum of the UK voters, and now also on the back of a Commons vote with a majority of 372 to leave. Under the Treaty we do not owe them any money apart from our regular contributions.

Volunteers proudly display their blood donation certificates. The China RH Union is looking for more donors to help the small number of people with rhesus negative blood in China. [Photos/China Daily]

Only a small number of people in China have rhesus negative blood, and a lack of supplies can be potentially life-threatening if they need an urgent transfusion. Zhou Wenting reports from Shanghai.

Xie Yingfeng recently quit his job to devote himself to an NGO that helps people with a rare blood type find donors who could potentially save their lives.

There are four human blood types: A, B, AB, and O. Each has a rhesus factor, either positive or negative. Generally, people with rhesus negative blood can only receive transfusions of their own type, while rhesus positive carriers can receive blood from both positive and negative donors.

Only three in every 1,000 Chinese has rhesus negative blood, so in the words of an old phrase they are “as rare as a panda”, which has led to it being known as “panda blood”. Moreover, many people have no idea whether their blood type is rhesus negative or positive until they need a transfusion.

The small number of people with rhesus negative blood means there is an equally small number of donors, which poses serious problems for people who require urgent transfusions, especially women who have postpartum hemorrhages.

Volunteers

Xie, 38, is the Shanghai regional head of the China RH Union, an NGO founded by volunteers in Beijing, most of whom have rhesus negative blood. Nationally the organization has about 4,000 members.

Every year, the Shanghai branch assists about 40 people who approach it in search of blood donations. For each case, Xie may receive as many as 200 phone calls from the patient’s family, volunteers, friends and even strangers who have read online posts for donors.

“It’s hard for me to do 9-to-5 office work because my phone is likely to ring constantly,” said the former construction materials salesman, who is currently living on his savings, but is considering selling delicacies from his hometown of Urumqi, capital of the Xinjiang Uygur autonomous region, to earn more money.

On a typical day, he spends hours confirming patients’ requests, rushing to the hospital or calling their physicians, and accompanying volunteers when they donate blood.

“The aim behind the union is that when people of the same kind are in trouble, we can stand up for each other,” said Xie, who is rhesus negative himself. In the 12 years since it was founded, the union has helped more than 3,000 people nationwide.

Having spent 12 years helping other people, Xie has become less interested in material wealth, which is another reason he quit his job.

The union was founded in 2005 by Beijing resident Wang Yong, who was deeply touched by media coverage of a rhesus negative leukemia patient who had been forced to abandon medical treatment because of a shortage of suitable donors.

Although Wang has a positive blood type, he began researching the condition and discovered that millions of people across the country are carriers: “I was an IT engineer, so I set up an online platform to make it less difficult to obtain blood for this small group.”

At first, the union－which has branches in 26 provinces and municipalities－received just one or two calls a week, but it now fields as many as 20 a day. The regional heads, who never turn off their cellphones in case they are called for help, collect information about patients, verify their medical information, post messages to volunteers via an online chat group and search for donors.

A precious resource

According to the union’s rules, six months must elapse between each donation, while people recovering from a cold or who have taken medicine have to wait a week after the all-clear before they are allowed to give blood. Women who are menstruating or breastfeeding are not allowed to donate. “Most of us don’t visit centers to donate blood regularly. Our resource is fairly precious, so we must make every drop count,” Xie said.

According to Wang, the largest amount donated by a single volunteer was 20,000 cubic centimeters, roughly five times the volume of blood in the average adult body, which required at least 50 separate donations.

“Some volunteers have stopped smoking or drinking alcohol and going to bed late to ensure they are healthy enough to make an urgent blood donation. Some slender women have even attempted to gain weight to meet the requirement that donors must weigh at least 45 kilograms,” he said.

The regional heads usually look for candidates within their home province or municipality, but sometimes volunteers rush to distant locations to donate blood.

In February, the union’s branch in Anhui province was looking for donors with B negative blood for a 60-something woman who was awaiting surgery. No one could be found within the immediate locality, but Kang Huiming, a primary school teacher in Lianshui county, Jiangsu province, volunteered to help. That night she asked a friend to drive her to the hospital, six hours from her home.

“It’s not about showing your benevolence－it’s about saving a life,” Kang said.

Although the number of members has grown gradually, some quit the union after a couple of years.

“When they first join, some people feel like they are superman and can help anybody. But if their help fails to save a life, it’s hard to drag them out of the low mood,” Wang said.

Xie, in Shanghai, recalled an unsuccessful attempt to save the life of a 7-year-old girl with leukemia. Having received a phone call from the girl’s mother, he immediately started looking for donors. Eventually, he contacted a suitable volunteer, but the man was on a business trip to Henan province in Central China. Desperate to help, the volunteer concluded his trip, flew back to Shanghai and rushed to the hospital. Unfortunately, the girl died just as he arrived.

“Many of the volunteers were sleepless that night. The volunteer who flew back even blamed himself for taking the trip,” Xie said.

Others have been lured away by money. Trading in blood is illegal under Chinese law, but “black” collection and supply agencies still exist. According to Xie, 400 cc of rhesus negative blood can fetch more than 20,000 yuan ($2,900) on the black market.

Decisions and pressure

The biggest pressure Xie faces comes when he has to decide whether to ask volunteers to donate blood to someone with a minimal chance of survival.

In May, he was approached by the father of a 2-year-old boy who had double kidney failure and was about to have a transplant. The man was hoping to obtain 3,000 cc of rhesus negative blood.

“The hospital said the transplant stood very little chance of success. To provide 3,000 cc, we would have needed eight donors, but their blood might save eight other patients who have a better chance of survival,” he said. Reluctantly, Xie declined the father’s request. He later discovered that the parents had bought blood from illegal dealers, but the boy died during surgery.

“In such cases, I shoulder overwhelming pressure from the volunteers, the patient’s family and my friends, but after all these years, I’ve become more rational. The truth is that we can’t always provide assistance in time or help people endlessly,” he said.

Wang has considered leaving the union on several occasions, but hasn’t been able to bring himself to abandon the cause.

“The simple act of disseminating a message can sometimes save the life of someone who may have no other way out,” he said.