G.INP i.e. the turning off when the DLM was reset would account for that drop in speed

Thanks for that info.

Can I expect to get back my previous speed in a few days similar to DougM's experience?

If the DLM is seeing the same patterns as before that got G.INP turned on then yes it will come back, but it may be a few weeks.

Blimey! a few weeks!

Oh well serves me right for trying to get a bit faster, the speed boost that BT applied a few weeks ago has affectedly been lost.

I have gained a Mk4 face plate that was not needed and lost 10Mbps download speed.

Ironically I worked on the construction of the new exchange which was built a short distance from the old one. This was mid to late 60's so I guess that's where the aluminium was used.

Pleased to say that DougM was right on the money, I was away for a couple of days and checked on my return to find that I was back to 62Mbps.

At least I now know why I will not get full speed despite being almost within throwing distance of the cabinet.

Had problems with aluminium during my time in electricity distribution but did not know it was a problem with the telephone system. Or more correctly with fast broadband.