I find their website excellent.
Someone mentioned a 'ballcocks' I think.
I entered 'ballcock' is the 'what are you looking for?' search box and despite what was once known as a 'ballcock' is nowadays called a 'float valve', it knew what I wanted, showed the full range of what they stock, and for the less technically aware, gave the following explanation as to what a float valve does:
"Ballcocks or float valves control the filling of a cistern or tank so that it is ready to flush. Also known as ballcock valves or toilet ball valves, some of these products can also be used to fill header and loft tanks. When these parts become faulty, they can cause a tank or toilet to constantly fill and the water would then either constantly flow into the toilet bowl or out through an overflow, wasting water. The range has brass and plastic versions and also includes bottom or side entry types".
Ballcocks | Toilet Spares | Screwfix.com
I can check the stock in local stores (of which there are four), can order online click and collect or just visit. If I was perverse enough to not want to order online, if stock levels are low, I could ring them and ask them to reserve it for me, which I know from experience they'd be happy to do.
I can also browse the online catalogue, which I find very well laid out. If for example I select 'Heating and Plumbing' from the drop-down menu, it gives sub-menus of 'Radiators, central heating, plumbing, guttering and drainage, fires stoves & electric heating, and ventilation'.
If I go to 'plumbing' I'll find ballcocks/float valves. among all the other plumbing stuff.
I'm not sure what more they can do to be helpful.
I can understand people who aren't computer literate and don't have wi-fi whinging about the loss of a paper catalogue. They're the time-wasters that the other 99% of Screwfix customers get stuck behind in the queue. But guys on this forum do have computers, know how to use them and have wi-fi access, so what's the big deal?
And I should add that in all the years I've used Screwfix, I've found the staff helpful and efficient.
When the government dropped the mandatory wearing of covid mask, still urging people to wear them, I was quite impressed with the notice on the door at my nearest local branch:
"You no longer need to wear a mask to comply with the law, but you do to comply with the rules of this store, for the protection of our staff. If you haven't brought one, we'll give you one. If that isn't acceptable, please shop elsewhere'.
Spot on.