It might be above the price range but Dublin River Boots are amazing worth every penny and they last forever! Btw i would say that they run slightly small for me so get a bigger pair!
I would say Dublin but that is above your price range
I use a pair of composite toe tactical boots as work boots- they're waterproof, durable, and super comfy. Only boots I've ever owned that have lasted longer than a year, and my feet stayed dry when I accidentally dumped an entire trough's worth of water over them. Mine are Original SWAT, but I don't know if they ship to the U.K. But imo tactical boots are the best work boots.
I don’t know if these are in the Uk or if they are over your budget but I love bogs! I’ve had mine for 2 years and they are in great condition!