(and my parents original one bought in the late 80's/early 90's lasted nearly 20 years).Thanks for the reply, I've just put that one on "reserve" too so I will pick it up instead of the first one. Also stainless steel front matches the cooker and I've heard that the best ones have stainless steel inside so hopefully this one does.
PANASONIC NN-SD271SBPQ Solo Microwave - Stainless Steel
Pretty much any £50 will do, one from aldi still going after 5 years.