Also topcashback/quidco of 4-8%. This deal's been running a while but isn't well known, every week you can book on Monday or Tuesday for following Friday, Sat or Sun nights. Some hotels are £25 (all ibis Budgets, some styles and some Ibis) and some are £40 (e.g. Ibis London Euston). Elstree (zone 6 London) and Docklands (zone 2/3 London) are great value for around £23 after cashback. You can only book for the same week but it comes up every week without fail and no end date. Price is per night for the room only. You can book just 1 night, or 2 or 3.
You must be an Accor club member but it's free to join and also means you earn loyalty points towards future stays.
Can now book for the following weekend too, thanks bowdiddly.
Ibis Hotels and Ibis Styles: