The following are sites that will list you :-
- AirBnB
- Booking.com
- Expedia
- FlipKey (TripAdvisor)
- Holidaylettings (TripAdvisor)
- HomeAway
- House Trip
- Owners Direct (HomeAway)
- Pitch Up
- Reserve Apartments (Glasgow & Edinburgh)
- Roomorama.com
- Toprural (HomeAway)
- VRBO (HomeAway)
- Wimdu
Then all the mainly comparison sites and multi-sell (hotel+flight etc) just a few listed as examples so you know who they are
http://www.kayak.co.uk/
http://www.travelrepublic.co.uk/
http://www.ebookers.com/
http://www.lastminute.com/
http://www.hotelpricescanner.com/
http://www.hotelbooking.co.uk