Welcome to the forum
Possibly the closest competitive HFT clubs to you maybe Kibworth or Hollins Green, i'm sure one of the kibby or HG people wil be along shortly. Don't be in a rush to go and buy something until you have been to a club and sampled some different kinds of kit. (most people usually offer)
You can be competitive with spending approx £300 or so, but you can also spend *ahem* "LOTS" if the bug bites.