Like most sheds Wickes have a 'price promise' thing, I think theirs is called Smart Value.
It used to have a get out clause whereby the product had the be the same brand, so it didn't apply to own label products.
Lots of get out clauses; had to be the same brand, had to be in stock locally, online suppliers not included etc.
Seems like things have changed. Last week I needed some grab adhesive, usually buy Gripfill from TLC or Toolstation @ around £2.50 inc VAT.
Wickes own brand was £3.99.
Moaned lightheartedly to the checkout girl, who immediately reduced the price.
Tried it again today with silicone. Wickes own brand over £6. Again, TLC or Toolstation around £2.50. Immediate reduction.
All they asked was my name & address - they have that anyway - I have a Wickes Mycard, where it was cheaper, how much I paid. Didn't check, didn't ask for proof.
I ain't paying Wickes full prices anymore!