Not for one of them at least, and in both cases, unless BT/Openreach have decided to put them in silly places in relation to the original cabinets, they won't obstruct any more of the pavement than the originals. For the record, here's one:
...and here's the other, where the pavement is
a bit narrower, but again, there's already a PCP/Pole there...
4 cabs in the town (again, like mine, luckily) have already been installed, including one which has had to be put on the pavement because someone didn't want it on the edge of their grass (even though an existing PCP is
on their grass, because it's older than the house which was built near there).