Hi and welcome
Could be numerous things going on here.
>> Apparently my line was capped at 2 Mb.
Wondering - what was your speed at Orange? It could be possible that if you had a 2Mb fixed connection with them, then during migration your line could have come across as 2Mb and not been upgraded to MAXdsl.
Your router should tell you your sync speed did you happen to notice what speed you were syncing to the exchange at?
Theres also the possibility that during the transfer you got whats known as a stuck 2Mb profile - which is quite common for some newly maxed lines.
As Pwiggler has also said - there have been problems with BT throttling connections during peak and traffic shaping which has effected all protocols... running at 1.5Mb seems to be the "normal" peak time throttling.
>> In fact at one stage my speed went down to was 138kbs for 2 days
That could be a bad sync which affected your IP profile - which will limit your speeds for a few days until it adjusts.
[edit]
Sorry eric our posts crossed - see the stuck bRAS problem also occured to you.
Although BTr
should be aware that such things can and do occur... BT (and AOL) seem to be one of the ISPs whose help desks have little knowledge about it. :?