According to this article the number of people advertising for a lodger has risen by 27% in the first two weeks of the year. According to Spareroom.co.uk the rise is down to people looking to raise extra income because they have over stretched financially after the Christmas period. The group have said that they saw a record number of people advertising for lodgers during 2009 and that it expects the trend to continue this year. With the average weekly rent costing £87 it seems like a good way to bring in some extra cash if you have a big enough house to be able to do it.