Thanks Peter,
You are, as ever right, the 1968 law on fences was produced in Australia, if you wish to read something that applies to the UK only you need to read what your local authority says or perhaps the Highways act 1980 or occupiers act 1984, I suspect neither will inform you of the right to knock nails into someone else’s fence.
You stated that you may say something in Latin to me, knowing that is a poor subject for me, what will it be - dulcis ?