The Shortlist - any Interesting Choices I'm Missing?

Cannondale CAAD 8 or CAAD 10 probably are the two best frames you can get as part of a full bike at sub £1k

Given your mileage and commute, I wouldn't go for anything other than disc brakes as rims get trashed with round the year commuting.
That only leaves the felt 75x which coincidentally will probably be my next commuting steed

I'd be hiding £200 on a credit card and bagging myself a Kinesis 4s

EDIT I may have misread, thought the bike was a Winter steed, now realise it's the buying process that's to keep you busy on grey days

Do you have to have a complete Bike? Have you decent parts to migrate? I went for a Van Nich Titanium for my winter bike and ive got to say i never regretted it, I love cleaning it as much as i love riding it (which is a bonus).

Its light and Racy it would tick those boxes

Aluminium Synapse 105 Disc would be a corking bike for £1k. Difficult to buy a 'bad' bike at that price range to be honest.

For the riding you mentioned, i'd be really tempted to see if you can get a deal on a 2015 Trek Domane 2.3. The older 2.0/2.3 frame was excellent over 'real' roads and the new one comes with 11-speed 105 if you can get the £ 100 over the grand sorted somehow. 2p worth anyway, it's all good.

The Trek's not a bad bike, I've got that exact model and it's done me alright for the last 12 months. Have seen that around £850 lately, but then the 2015 model is now only another £50 and has 11spd 105 instead.

Other big names have dropped the price of their models for 2015. The alu Cannondale Synapse 105 can be had for £999 now, which has discs too. Alternatively, the Giant Defy 0 comes in at the same price too, with some Ultegra bits on it.

I've got a Whyte Suffolk on order myself, hoping it'll be a more capable year-round bike than the Trek.

Sensa are fine bikes for the price, one problem with them though is the wheels. They have to make savings somewhere and they've decided that the wheelset takes the hit. Heavy rims, cheap hubs with bearings that won't last (in my personal experience) little more than 400 miles.

If you buy a Sensa then that's fine, just make sure you go for Mavic Aksiums or some such, their own brand 'Supra' wheelsets are pants.

I'm in a similar boat to you, hoping to get £1500 to spend next year but £1k may be more negotiable...
Sensa do some nice bikes through Merlin cycles.
Planet X may have an offer that comes in the £1k bracket.
Dolan have my interest too.
Cannondale Supersix if you can get it on offer; may be a bit racy if you have comfort/injury problems?
I'd love to go for a Kinesis Aithein (Winstanley's have frames for under £500) but I can't wait to source all the parts and get it built up, and I've not had a carbon bike so that is a must for me.