"F" news@nowhere wrote in message
o.uk...
It looks as though I'm going to have to thread a thin, so very flexible,
cable into the ceiling void from below and then out again a couple of
metres further across. I've used a straightened coat hanger in similar
circumstances before but the current stock won't straighten to the
required distance.

I can't get at it from above, but at least the joists run in the right
direction for me.

So what's the best way to do it?

I use one of those flexible drain wire things. Just attach what you want
to put thru the void to it, get it to where you want, detach the cable from
it and pull the drain thing back again leaving the cable where you want it.