There have been a huge number of deal threads referencing coupon "TDX-PKJK" which takes £20 off selected electrical products over £100.
That coupon expires on December 21.
Clubcard Boost (double the value of the Clubcard points as store credit, e.g. spend £5 in Clubcard vouchers to pay for £10 of products) ALSO ends on December 21.
So (assuming you have £40+ in Clubcard vouchers saved up) you have a very limited window of opportunity to combine both promotions to maximum effect.
There are 4,111 in-stock products that qualify both for the £20-off-£100 voucher AND the Clubcard Boost doubling, and you can find the full list by clicking through to the deal URL which is pre-formatted to show only qualified items.
Remember: you can add ANY combination of items that adds up to £100+ and that's the voucher code condition fulfilled.
Then you can pay all/part of the remainder in Clubcard Vouchers.
Hopefully this will help some people as I've noticed quite a few expressions of surprise in thread comments that this or that product qualified for the "double" deal. Now there's no more mystery about what does, what doesn't!