The trains will be 24hrs on Fri/sat from next September so luckily don't need to stay near the venue.Which ibis are you booked in?
The London City airport one. I didn't realise that about the tube, but it's useful to know.
I wasn't particularly looking for a hotel near the venue, just one near tube/DLR and convenient for the jubilee line, and this was the cheapest (excluding places too far way like Luton airport!). I would actually prefer to be in one of the Travelodges nearer to central London but they can't be booked yet, and I wanted to get something while still reasonably priced.