On 7 Jan, 12:07, petek wrote:
My nextdoor neighbour has just been round to ask about re-connecting
the cable to his telephone extension,

Repair with telephone cable and appropriate junction boxes. You might
be lucky (if there's slack) and just use one, but you'll probably need
two junctions boxes and some spare cable.

These parts are now sold on every high street, so there's no excuse
for not using them. Equally the punchdown tool - the "one job" plastic
ones are under a quid, so don't be tempted to use a screwdriver.

Use IDC (punchdown) connectors and solid core phone cable. Don't use
choc block or stranded alarm cable - you'll get problems with it long
term, especially with ADSL. Screw terminals are for use with stranded,
IDC for solid core - mixing them is a bad idea.

The circuitry is just a quick bit of web searching. Easy.