HELL NO
Do you really think the government can be trusted to create such a master database ?
The labour government tried it. The initiate was called NPFIT - the national programme for IT. The idea was to make one computer system, with one massive database, and have everybody use it. They gave fujitsu nearly 900 million pounds to create it .... and got nowhere
http://www.ehi.co.uk/news/ehi/8665/nhs-runs-up-£31.5m-fujitsu-dispute-bill
Fujitsu were chasing at least 700 million of that and the government has run up 30 million pounds of legal fees fighting over where it all went wrong and how was to blame.
I can tell them for free where they went wrong, somebody somewhere with no actual knowledge of what healthcare professionals do had the same thought as you, and thought "how hard can it be? we'll just give a contractor boatloads of cash and get them to make a master database".
The needs of all the healthcare professiionals in the UK are so vastly different, even among those with the same job but in different regions, that any such system is bound to fail.
That is why we are currently in a scenario whereby NHS contractors who already make such systems are moving towards a "connect all" ethos, of allowing everybodys systems to talk to each other, rather than the "replace all" solution put forward by labour that sought to put all us private sector companies out of business with a massive public sector contract.
This should have the same net effect for you however, in that your hospital can see your GP's clinical record after asking for your consent to see them. However NHS IT is so backwards that getting to this stage where every hospital and every GP in the country are on a system that can talk to each other and allow record sharing is still a long way off. As an example, my wife works at Mid Yorks NHS trust - who only went paperless last month.
The target is to get the NHS paperless by 2018
http://www.ehi.co.uk/Features/item.cfm?&docId=403