Further update.....I got lucky on the way home last night. I stopped at one of my LFS
(one I wouldn't normally buy fish from, but is ok for dry goods etc.). When I went in, the shelves were all being cleared and most of the tanks were empty. They are based in a garden centre and have been taken over by a new franchise (Maidenhead Aquatics). I managed to get about 30lb of live rock out of one of their display tanks for the princely sum of Â£5! I've added this to my tank, so i hope this will help with the last bit of the cycle.
I measured my ammonia when I got home following the previous days water change. My test kit starts at 0 and the next step is 0.25 although definitely not zero, the colour appeared half way between the two 0.1ish at a guess.
Although I don't agree with cycling with fish (As can be seen from my original post re using Biomature), I've heard that Triggers are particularly hardy and should survive the cycle. Is this true?
P.S. I will do a Nitrite test tonight and report back tomorrow (last time I checked it was about 0.1ppm).
Pic of my tank attached aswell