Yeah it would have been a good idea for me to check for dial tone on that second circuit and I would have found out what was wrong instantly, but oh well.
I was able to get an engineer out by telling them there was crackling on the phone, even though there was no crackles lol. It was around 3 weeks of phone calls with the broadband team and they would not send an engineer out, they just kept sending me replacement home hub 5s even though I said I did not want them. So in the end I just phoned the fault team saying the phone calls were crackling. And an engineer came out a few days later.
Once the first engineer arrived I could tell he was annoyed because there was nothing really wrong with my line and my speeds were 65mb, so I thought I would have gotten charged. Until he noticed the spike on the line graph, and instantly put the master socket back together and said he would get another engineer out in a few days.
The Second engineer arrived around 5 days later at around 8.30am with no phone call so was unexpected. He came inside done the line check like the first guy, seen the spike in the graph. Stuck an oscillator 87J on the line and went to pole. He disappeared for around an hour, came back and told me there was two faults on my circuit. One that affected my speed and one that did not. He told me there was the issue with the bridge tap at the pole with both pairs connected together, and another issue he couldn't explain that was from the exchange to my pair in the cabinet that is used for ADSL services. He plugged it all back in and left, there was no mention of a charge so I don't think ill have to pay a penny