is there actually anybody on here that knows what they are doing?
amateurs advising amateurs.if you really cant bring yourself to cut seal,(and by the way,if you cut one end close to the crimp and hammer a cable clip through whats left to open crimp back up it can be resealed with all markings intact),then try pulling the service fuse out slightly,usually there is enough slack on the seal to cut the power,wedge the fuse at this point and away ya go,ffs,this is called the electrician forum,though i doubt there are many on here.Im sorry to be so abrubt,but it seems to me that people these days get to call themselves electricians after doing a bit of "theory" work at college,or even worse,online,if you are so unsure then leave well alone.worse case scenario,cut the seal,reseal after with yellow crimp,cut the plastic off after crimping & sit back & wait for call from dno asking whos been tampering,heres a clue,you'll be waiting a long time.meter readers are just that now,health & safety dictates they can read a set of numbers & tap them into a machine,examining seals is beyond their remit.