As you'll see from the linked thread, I had been messed about by Barclays. From the last time I posted, I said that I would fight them through the Financial Ombudsman Service and through CIFAS themselves. I'm pleased to say this week I have received confirmation from CIFAS that Barclays Bank was wrong to place the fraud marker on my account and I can now get a mobile phone, mortgage, overdraft, loan etc when previously I had been blacklisted.
Just wanted to say thank you to all the private messages of support from fellow Bitcoiners! I saw that the thread was posted on r/btc and I have to say those guys absolutely slated me! Will stay the hell away from there in the future!
Thanks again and if anyone finds themselves in a similar situation, let me know I'd be honoured to help you.