If I were you, I'd put it back into property but overseas, where the markets are picking up.
I've just returned from Cape Town, for example. The property business around the V&A Waterfront is absolutely booming ahead of the 2010 World Cup.
Another place to seriously consider is Canada - the Niagara region is littered with fantastic houses for unbelievable prices, as is the downtown Toronto area. Condos in the GTA are seriously cheap - you're looking at around CAD$235000 for your £100k, and you could easily rent it out. Have a google.
RR