I have tried a completely different router and normally yes, I will get a burst then it falls off.
Plus I borrowed my sisters openreach modem from her house and tried it and the result is somewhat similar.
I also connected my laptop directly to the modem too instead of my desktop and the result is the same.
With the OOKLA speed test its almost a comparable to TBB. The speed spikes then falls off.
I have just this now changed the filter.
So I will see if that makes any difference, I think if I pop to the pub tonight that might keep me out of the way for some baseline testing!
Thanks for your input.
Edited by shuntfield (Wed 14-Jan-15 16:39:56)