As an update, I now have:
* redmoor wood with anubias, java moss and java fern attached to it (anubias and java moss ball look perfect; java moss and java fern doing ok - I've read that the dark patches on java fern are normal);
* vallis nana and vallis tiger - the former is doing better than the latter but I've had to remove some decaying leaves or parts of stalks from each;
* Brazilian pennywort - was looking good but developed holes in it overnight (despite a 20-min salt dip prior to putting it in the tank, 2 snails seemed to have been brought in with it and were to blame; I've since removed them);
* Amazonian frogbit and red root floater - the former looks better than the latter, and definitely my preference as it's less likely to clog up the filters and get swilled around the tank.
These were added in 3 fortnightly stages, to try to minimise algae growth.
The anubias was from the LFS; the java moss, java fern and vallis from Aquarium Gardens; the Brazilian pennywort and floating plants from Aqua Essentials. Overall, between the two online purchases, I felt Aquarium Gardens to be a more professional experience (answered queries immediately, packaging was much superior, standard of plants and quantity of free-floating plants better, didn't contain snails, sent an automatic e-mail with details of purchase and when dispatched) albeit more expensive (from recollection).
Still have some silk plants in but am removing approx 2 per week, to minimise loss of good bacteria.
Pic to follow.