Apologies if this is a repeat, but I've only just found out about this offer and it only has a few days longer to run.
The info says "50% off our all-areas 12 month Everything subscription until 30 September."
I renewed my own subscription at the beginning of August 2025, so wondered whether I'd be eligible. However, I've just phoned them and the answer was Yes! They've put a code onto my account which means that when I renew next year, it will automatically be charged at 50% off.
Customer Service Phone number = 020 3326 6300
Hope it helps someone else.
STG