Thanks for the link - very interesting. We plan on living for months at a time away from 'home' including the UK and Australia, but from an experience stand point, not to save money. However, you can get some great deals. For example, in the summer months in England Universities rent out their student accommodation. DW has done this twice in recent years, spending 2 months each time, getting around with a rail rover ticket and buses. (Student accommodation is MUCH better than here in the USA, but don't expect an en-suite bathroom ).
Places she stayed include universities in York, and Plymouth plus the London School of Economics (LSE) (Imperial College, London also does this). York was 50 GBP a week, not including food, LSE was 25 GBP/day including a full English breakfast, which is tremendous value for central London.
Next week we are going over for 3 weeks, rail rover tickets, no car, but next year we are both going over for 6 weeks, including a couple of weeks staying at York university.
In 2011 we are planning to stay for 6 months in Guisborough (N. Yorks) or close by, and expect to get a furnished 2 bed house or apartment for ~400 GBP a week.