Have decided to buy a kennel for the dogs and wonder which kennels others use and what your experiences of these type of kennels are.
Having rung doghealth today I have been told that they no longer sell them.

So where do you get yours and are they good or bad?

I would expect them to run with condensation, like UPVC conservatories. :( Concrete kennels do the same.  So do fibreglass. 
I would go for block built or timber which breathes, every time. :)

I have a couple of blocks from Canine Kennels and they are absolutely fabulous. They claim to be chewproof and are certainly still looking like new here after 2 years of use with some very strong chewers ;-), they are easy to keep clean and can be pressure washed no problems, they are cool in summer and with a heat lamp stay very warm in winter too. The only drawback is that they are very expensive to buy but, after having several wooden units over the years and having them chewed to bits they are well worth it, I suppose it really depends what type of dogs they are for and how long they will be spending in them.