The bag for life is better value XD
It is not worth the time and effort of 8p unless you are doing a trial run. Stick to Dulux or B&Q have their own brand which is very good in quality
I agree with other comments. My experience of this paint isn't good. Three coats and it still looked awful. Cut my losses and bought another brand to paint over it. I used Matt by the way.
I used the matt, despite the paint being thickish it was dire
Just for a bit of balance, we painted most of the house walls using frosted silver silk last year during lockdown, and the end result is very good after 2 coats, and still looking just as good one year on, so silk must have been better than matt.