Ok, here's the situation. It is currently "difficult" for people in the UK to get involved in these cryptocurrency without having pay at least 25% more than what they are currently worth through websites such as localbitcoin and bitcoinbargain. How hard would it be to create an exchange website like btc-e and MTGox that accepted UK balance transfers and other payment methods such as PingIt. An exchange where people in the UK, Europe etc could withdraw their money simply, without having to go through multiple transfer routes with high fees. There must be a reason why these websites don't exist yet and why you can't simple withdraw your funds straight into your bank account. Any advice would be greatly appreciated 
The short answer is obviously very difficult, else it would exist.
Intersango had an exchange, but they got through 2 or 3 bank accounts in the UK before being shut down.
No idea what you are on about with the 25% though. bitstamp.net is very efficient, just a £9 charge to wire money to them with SEPA transfer. Give them a go. Its only 25% if you want to deposit £40 or something