I can't imagine the level of consumption that leads to more than one online purchase every day. You must have a constant mountain of cardboard at your home.

But anyway, shops selling luggage are common. They probably sell scales too. Argos, Tesco and Ryman have them.

Electronics shops like Currys have monitor arms, as well as office supply shops.

I won't guess what a good shower filter is.

Office supply and electronics shops also have label printers.

Moth repellent is available from large supermarkets, DIY stores and hardware shops.

All of these are also available online from British companies that pay their fair share of taxes.