I'm not sure whether this is an exclusive code to me but I think it might be a generic one anyone can use for the month of April. It gives you 20% off practically anything aside from certain items such as "electrical appliances", but there is a massive range of stock.
https://www.zoro.co.uk/
PR2221APR
I have used in the past for some bargains as picking up the indestructible Record IrwinT-Bar 48" Sash Clamps stupidly cheap at £35 a clamp but it seems the price has gone up since then as with the discount applied these work out at £44 inc VAT a clamp, still a very decent price compared to everyone else though.