Now for anyone planning this, and wants to see if they can get a good room rate for somewhere to stay - you can get some good value nights at Travelodge.co.uk (click here)
They have two saver rates for certain nights in some london locations. Okay - this doesn't include breakfast, but you can get a very good room for as little as £26-00 depending on what dates you want and where you are staying.
Note: You don't often find more than one or two nights together. This wouldn't be an option for a longer stay.
I've just had a very quick look, and the nearest I see with the £26-00 a night at the moment is London Docklands - about 4 miles from the city centre itself. Otherwise you can get some on the Sunday nights closer as well or at £49-00 per night.
These rooms are often doubles, but sometimes you can get what they class as the Family Room for the same rate - which means you can sleep at least 3 adults - making it cheaper still sharing.
We use these cheap rate rooms all the time and they are superb value!
There is one in Convent Garden, but I don't see any cheap rate rooms around the 5th November I'm afraid (there is one for 4th November).
ETA: Have just checked further, and London Kings Cross Royal Scot (Not just Kings Cross, that is a separate hotel) has a £26-00 night on the 4th, the rest for that week listed at the next rate of £49-00.