The message
from "Alan Holmes" contains these words:

I would not like to take the risk of crimping mains cable, I would use a
proper juction box.

That might be a mistake. Apart from not complying with the current regs
if the box is inaccessible, it's also just silly because crimps are more
reliable than screws in a junction box. You might notice that the sort
of power cables that run underground into substation are crimped
together, not done with screw terminals.

--
Skipweasel
Pay no attention to that man behind the curtain.