UPDATE: BT went to the cabinet and fixed the problem. Took them less than 10 minutes. Upload is back to normal. I never would have expected it to be cabinet side but I am happy to be surprised!
Does anyone have any idea what they may have actually done in the box to fix it, I'd be very interested.
Tried to update thread title with resolved it's not having it.
Thanks all for the help replies and thanks to Zen for sorting it out super fast.. oh and Andrew from Openreach, my mum, my dad... happy Christmas all