In message , Chris
writes
Hi there,

In the process of running network cabling through the house, I lifted a
floor board upstairs to discover an 'interesting' bit of wiring on the
lighting circuit. Basically on one light fitting, all the T+E lighting
cables (including switch cable) are terminated in a terminal strip
(choc block), with approx 1 metre length of two core flex going through
the next joist and to the light fitting.

Would it be acceptable to replace the terminal strip with a junction
box attached to the joist, and replace the flex with a length of T+E,

Yes.
--
Chris French, Leeds