In reply to jethro kiernan:
The frame set Genesis looks lovely. That's the way I went - taking bits off the old bike to build the new, helped along the way by a Sigma Sport warehouse sale (which is where the frame came from in the first place) and other handily-timed discounts. All of the old bits have now been replaced with new, and the old bike is now restored as the winter bike.
One word of caution (apologies if this is blindingly obvious to you, but it caught me out) - getting a crank to fit a BB size that is not the default standard can be expensive as sod's law says they won't be in a sale, and adapters don't work. Fortunately, a crank set in just the right size (to fit BB30) turned up in a sale just as I had resigned myself to 'a difficult conversation' with SWMBO.
However, with £1100 to play with you should be OK. I've no idea what a BB86 fits, but Wiggle & CRC have got some substantial group set sales on at the moment. 11 speed 105 for £300, which leaves you a fair amount for some decent wheels etc. After much grief with saddles, I can heartily recommend a Charge Scoop, which at c£40 is way superior to several others that cost many, many times more. The red one is orange by the way...
It does all add up fast - seat post, saddle, bars, stem and tape, group set, wheels, tyres, tubes, bottle cage, pedals but you should be fine on your budget unless you get a hankering for carbon and Di2. Don't forget to allow a bit for the LBS to put the BB in for you if you haven't got a press