Odd Sync Speed issue

[#1]

Back in December I decided to leave Plusnet in favour of Vodafone.  At first all was peachy, I was on their 80/20 connection and off peak I was getting 80/20, but their network in my area couldn't support my connection so I was released from my contract and returned to Plusnet.

Before I left Plusnet, I was getting around 55mb on my fibre connection, and on returning I'm getting the same.

My neighbours on either side of me both have BT and get their full line speed of 80/20 whereas I do not.

I'm missing 20ish somewhere.  I'm above BT's fault tolerance level which is frustrating but both of my neighbours have a higher minimum speed tolerance.

I have an NTE5c faceplate into a Draytek 130.  The line seems stable, but just not as fast as I want!

Any ideas?

[#2]

Apologies for the delay.

Not sure if this has changed recently, but you appear to be getting 69Mbit now.

The last 11Mbps could be down to routing to the cab or any number of things. All I can say for sure is that it's not DLM.