On 10 Feb, 09:54, "The Medway Handyman"
wrote:
Anyone know where I can get a wire rope type lock - sort of thing used for
bicycles - but longer.

I make mine, by silver-soldering ends on to exactly the length I
need. Having exactly the right length (i.e. no free loops) makes them
rather more secure. Even then they're not up to a high-security task.

Plastic sheathed chain is much more secure.