...Well, not that counts anyway.
Went back to the local independent running shop where I bought my swanky new trainers - the ones that made my toes numb! Spent over an hour trying on different trainers, and running round the block in them, before going back to reassess the original pair and trying to find a way to lace them up that works on my feet.
Will test them - and yet a different lacing pattern - properly tomorrow.
Post edited to add picture (so now a few of you will have seen them twice).