Hi Chris,
I would certainly be interested in hearing your recording of 'They Brought the Sea to Manchester' if you can find the tape.
I am also seeking a recording of another radio programme about the Manchester Ship Canal. It was called 'Tales from the Towpath', I believe, and there are a few details about it at the bottom of the following web-page : http://www.waterwaysongs.co.uk/36_miles.htm.
If anyone has a recording of this please contact me.
Many thanks,
Ian