I live in Tamworth, Staffordshire. Good you’ve joined a local club the knowledge members have will help you no end.
Quite late in the season now so when you get your nuc and transfer it into your Flow brood I’d recommend pre-fitted wax foundation as foundation less frames will use up slot of resources your bees will need soon. If you can get frames from the club pre-drawn comb even better.
Source some Apimix sugar syrup 14kg is fairly cheep and feed your bees all of it.
Use your super box (empty) on top of the crown board with a rapid round or bucket feeder.
Feed for two weeks solid and longer if need be. Inspect weekly to see how the brood pattern and stores are doing.
As it’s a nuc unlikely you’ll have any issues but you might want to sourse a standard honey super with drawn comb or again pre fitted foundation and add when the brood is packed.
You’ll need the extra stores for overwintering and better to do this than using the Flow frames as it can take a while for the bees to use them.
Colony strength and Overwintering prep should be your priorities at this time of the season.
Welcome to the Flow Family