Thanks for the replies. Sound like there's no hard and fast rule and it's down to individual preference. Modern fittings seem to grip wires very well without twisting, so that's probably the way forward for the reasons you stated.
When inserting two or more wire ends into a screw terminal fitting - such as those in a main socket or junction box - is it considered better to twist them together, or not? I've read that twisting gives a more secure electrical connection, and lessens the chances of one of the condutors being insec...
