Oooops, sorry Graham. In my embarrassment at not thinking to turn off the flash I didn't finish looking at your post. Very plump and happy looking fish you have there.
@ Hal. I do intend to restock once I have the tank sorted. No more guppies though.
I intend to to put a permanent air curtain at the back of the tank so once that arrives I will do a deep clean, check all the levels, then get a few more White Clouds. The fry should be a tad bigger and I will see how the tank looks as a single species community.