On 17/01/2020 16:15, Fredxx wrote:
In the good old days I would have used junction boxes but now these have
to be 'accessible' I ought to use an alternative.

I have tried crimps in the past and been thoroughly disillusioned with
them. I have found them unreliable and easily pulled apart, even with
ratchet crimping pliers.

Is there an alternative convenient and affordable method recommended
where access is not required.

Solder and heat shrink. Or Wago.