I've never used a number on a bike TBH but I'm guessing the way the holes are set high means the top bit will almost wrap around the bars so there's just the lower bit with the number on 'dangling', but on most modern bikes this will then be behind your mass of cables so it must be ok.
I'm going to have a dry run today when I swap my tyres over and have a general fettle
Is anyone driving in on the day from the Salford side
I'm going to cycle there (from Kearsley). The other option would be to join the M60 and head toward the Sheffield turnoff.