As has been said, go whole of market. Look at Charcol for quick quotes and guides to how much you might be able to borrow.
Also, consider a year or two at interest only just to help you adjust to the new spending amounts. Regardless of people saying this is bad advice, it isn't as long as property values increase, which, given history, they will. It works, for a hell of a lot of people. A GP friend of mine pays interest only on his house in Sandbanks and has done since he moved there. It gives him and his family an enjoyable lifestyle and once the kids move out he will move, the value of his house will pay off his outstanding mortgage and he'll be able to easily buy something smaller.
But, this is an extreme example (albeit common), a year or so on interest only is a much more favourbale option. Remember, this won't be your last mortgage, you'll move, bigger mortgage, etc, so a year or 2 IO now will not hurt one bit.
If you can afford capital repayment, then great. Also consider paying slightly more if you can. Say your mortgage is £675 a month, then you should consider paying £700 a month (£25 overpayment). This can help reduce a mortgage term by up to 7 years +
Lastly, insurance. Make sure you budget for Life Insurance, home insurance, building insurance, and some form of protection policy if you are injured or unable to work. Don't take the quotes from mortgage brokers, looks these offers up yourself.
Case in point: My home insurance was billed through my broker via AXA. They quoted me £120 a year for £15k cover, no accidental, and pretty much no other frills. I went to AXA directly and for £112 a year got £60k cover, personal liability, accidental damage, annual travel insurance and some other bits too.
My life cover, 30yo Male, non smoker non drinker. £12 a month. From my mortgage broker.....£47 a month.
Do your research and crack out the notepads.

Good luck