When you switch to one of their other branches the price is over 400 pounds. It obviously a pricing error.
I once got Fluke 3000 kit meters (meter + extras) for something like $50ea from RS Components.
It was a website pricing error and they had them in stock. I ordered all the Sydney stock (30 or something) and after that appeared to work I order like 100 or more from RS UK stock.
I deliberately avoided buying more than they had in stocking knowing that the buyers would surely see the error and sort it before they shipped.
Got a phone call from them saying they goofed the price and it's way below their buy price (no kidding, it was something like AU$700 retail), I played dumb and said I needed that many to equip my factory and I made a legitimate purchase
I think they honored another 50 or so but declined the rest.
They got delivered and I slowly sold them off on ebay for a large profit