i have to say - whilst driving back from the PIL's the other weekend i was shocked when we stopped at the M1 services at Teddington (which are the first services you come to if you're heading North out of London) and i changed DS in a miniscule feeding/changing "room" (cupboard). the whole place stank of poo and the chair provided for feeding was incredibly uncomfortable. i ended up taking ds into the restaurant to feed him, and i was dying for someone to come and tell me that i couldn't, but no-one said anything.
by contrast, H&M in my town centre (Northampton) has a fantastic feeding/changing area (which they call a "parents room" which i think is nice as it doesn't exclude fathers), lovely and clean with a really comfy chair for feeding.
would love to hear other people's experience of feeding areas - do most of you feed in them or do you take your LO and feed them wherever? i'm just nosy, really!