Well one seems to be in Newcastle and the other In Alsager.
Newcastle is pretty easy to get to from J15 of the M6, its a straight road that doesn't get that much traffic, it will take 5-10 mins off the motorway - are you sure it's 10 miles though, I'm sure it isn't that far away. The postcode ST5 2EG appears to be Friarswood Road which is just on the edge of the town centre so you won't get snarled up in the traffic on the ringroad.
Can't say about Alsager, I've haven't been for years but it's not a massive place and I cant imagine there been lots of holdups traffic wise.