Mandel / Johnstone debate on video…

This lunchtime my old comrade Rick Hatcher called round and handed me four Sony large reel video tapes from the late 1970s.
They contain a debate between Ernest Mandel and Monty Johnstone of the CPGB. Possibly others took part in the debate – Rick thinks at least one CP woman (maybe Bea Campbell) was on the platform.
I am now getting quotes to have the tapes digitised- they have not been viewed since the 1970s and are in an old format Sony V-32 for Helical Scan tape recorders.
It might be an expensive job though- over £100 per reel to get it done professionally.
So if anyone here either remembers the debate or has contacts in the A/V field who might be able to do this cheaply, please get in touch!!

Was it this debate or another one: https://www.marxists.org/archive/mandel/1970/xx/worldrev.htm Best, Martin
Hi.
It has to have been a later debate. Certainly after 1976 just going by the format of the tape it is recorded on.