I was a long standing customer of Wilko despite the decline (which started about the same time the new CEO came in). I may buy the odd item again from them in store, (not at self-serve), but I will NEVER EVER buy from them online again, and I will NEVER buy from another business that uses Evri (Hermes) to deliver. They failed to deliver on three occasions. On the last occasion they even claimed they had tried to deliver - when I was sat in waiting for them!
I'd advise you to think very carefully before buying from them online especially if the delivery is urgent, 'Next Day' to Wilko/Evri means maybe sometime next week, if you are lucky.