Thanks skyewalker, a ghost subtractive; 10/10 for inventiveness. I'm not sure "silly" is the word I'd have chosen but I reckon most, if not all, future hosts hope you don't become a trendsetter !
Thanks for all your entries and as usual this had not been easy and it's not possible to comment on all clues so please don't take umbrage if I have failed to specifically mention clue(s).
Touches I like include Paul's fringe, skyewalker's mobile data, mattrom's bottom (ooh er Mrs), fiery's: Neu! & PiL double bill, sunray's torch, tyke51's repartitioned Berlin, malcolmxword's player's debut & BBM2's Orient accumulator.
Just missing out from my final shortlist are mattrom @3, skyewalker @ 7, both brexits from peterm & mattrom and the seemingly innocuous but deceptive malcolmxword @ 30.
I have two slightly ahead of the field but I feel formation spoils the surface and could be deemed superfluous in kt17 @ 14 otherwise this might have got the nod; so after a lot of deliberation I'm going with BBM2 @ 20
Acts likely to cause disruption to the railway
https://youtu.be/EURNTMlUZFM
Cheers.