It seems that our phoneline has been working for a few days now, but not the broadband (Due to the capacity problems).
So my original reason for the post - 'Should faults be checked before migrating over?' still stands really as I feel this MAC couldn't be just the cause of all this. Especiallly listening to the Openreach Engineer's comments yesterday 'This box (pointing at the excahnge) is a load of rubbish, people have been waiting for 6 weeks for broadband and BT know about it.
This MAC subject seems to be just a side issue to me.
Anyway I'll find my way back up from the bottom of the garden now (The only place I can get a slight 3G signal) and back to the dark ages.
Just to continue this post, I still have no broadband. Getting to 2 weeks now.
I'll have to now look for a new job as I'm now unable to do my work. But that's ok because I can claim £18 compensation for all this life affecting trouble.
It's not used to run a business - I'm sure most people have to do work at home as overtime now and again.
This response isn't an excuse for being treated this way and not relevant.
Thanks for this information - however little it's helped me getting my issues resolved.
I do now know the difference between a cabinet and a brick building now though.