Mr Noise,
And who exactly have they held up?
Er.....well me actually, admittedly a while ago(they have probably learned that it won't work at BRS now), but a certain a/c with a gold harp on its fin alongside me on stand 5 called for push & start before a tug had even arrived (shameless!), after several mins we called ,as we actually had a tug, their clearence was cancelled and off we went.
If so I suggest you take it to the CAA
I believe that would be the "IAA"
Cheers Silvertop