For a 10mile London commute most styles of bike can be made to work so think about practicality, alternate uses and security.
In my opinion, rack and mudgaurd/fender eyelets are a deal-breaker. If you have them, you dont have to make use of them but if your bike lacks them you will have to use hack solutions that are heavier and less effective. Make sure that the eyelets are usable and dont interfere with any other bits esp disc brakes.
Think about the required tyre clearance. You need at least a 28mm tyre for London in winter and 32 may be better for big riders.
Will you use the bike for anything else apart from commuting/utility, eg weekend off-roading, fast sportif road rides, loaded touring holidays? I used to have a doitall commuter bike but now I have a dedicated one with a separate play bike.
Security: flash brandname bikes are thief magnets. Old road bikes fully rigged with rack and fenders seem to be less attractive.

My own commuter solution is a hub gear/disc brake (Shimano Alfine) flat-bar bike, it is low maintenance, easy and clean to use.

If derailleur gears are your thing then a flar bar road bike such as the Sirrus or a practical cyclo-cross (with eyelets) are pretty good.