Just an update as to what is happening or not as it seems, no change in fibre speeds but now the checker is showing I am connected to cab 14 but only have the old available speed showing, this has changed from when I looked before which was saying I could get up to 80mb. I saw an open reach engineer outside house in a duct and wondered if they were looking at my line, so out I went to be nosey, the chap explained it was for a different fault somewhere else. but he did say that it looks like I am connected to the new cabinet but! fibre is still patched in at old cabinet. this effectively means that there would be no improvement in speed. this being the case I don't see the point of fitting a new cabinet.
Any way I will wait and see if the planned upgrade works are carried out and let you know.