Herein lies a grey area...
The banks will lend 'unsecured' to
homeowners for greater amounts and over longer periods than what I have previously mentioned. However, my assessment being, that if you scratch the surface then you aren't really taking an unsecured loan, if you have to be a homeowner.
For a true penniless oik - like my good self, without a turnip shack to shelter under, then you're looking at £25,000 over a maximum of seven years.