No official website, but there is some brief info on the production company website TigerAspect.
I watched from the start and can give you some info.
From what I know, David was a chartered Accountant, not sure what Ann did though. Both were married when they met each other. They owned a big house in Essex which they sold to fund their Slovakian idea.
That is all I can think of at the moment, which was shown fro the start of the show.