Pete Shew wrote:
.. the sort that had a nail or screw through the strap with a slot at
one end. the other end goes round the cable, through the slot and
folds back to secure.

What are they called? Are they still legal? Can you still buy them?

http://www.saren.co.uk/cabletiesclips.htm

suggests you can still buy them. I know of no reason why they should be
illegal.

--
Adam