When upgrading a consumer unit is it ok to re-use the existing tails?

This Q & A is one of the thousands posted in our Technical Expertise area and answered by our Voltimum Experts.
Question:
When upgrading a consumer unit is it ok to reuse existing 25mm tails that have been installed from an outside meter box running through a cavity for less than a meter to the consumer unit location?
Answer:
Gary Parker, ECA
Yes, of course it is. As long as there is no element of harm on the cables, it is fine.