Hi Rob, i am based in Leicester and Essex.
my kit was cheaper, but I have had problems with extanding the camera's cable from 2.5 metres to 7+ metres.
If I was to buy another kit it would certainly be a wireless one.
To be honest I can't fault the polarbrite survey kit.
If you can I would suggest going over there and having a look at the polarvak and survey kit, I think Craig is thinking of doing a complete polarVak kit with survey kit for around £1,000
If you give Craig a call tomorrow tell him Matt at MB window cleaning told you to give him a call.
Matt