...long story short - we moved into out new house in December.
After being here about 2 weeks we realised that the kitchen hob didnt work properly (have had to replace it) and that the conservatory roof leaked (have had to pay out to get it fixed) and the boiler didnt work properly (i.e. it didnt provide much hot water) and it stopped working altogether yesterday so now we have no hot water or heating 
To say I am not happy is a bit of an understatement.
A gas and electrical safety certificate were both done a month before we moved in and stated no problems.
We have been told by the plumber that
a) the boiler wasnt plumbed in properly (it was put in in 2003) and
b) the electrical wiring isnt safe.
We are having a new boiler put in tomorrow but I am wondering if we have any redress against the companies who provided these certificates?
Probably a long shot........?