BenMcr`s brilliant post 42 helped a lot.
The Goodmans codes for TiVo given from the link quoted are :-
No code found on TiVo handset data base. Volume not working.
The Goodmans codes which the V+ box has are :-
Of which 1720 is the code to my TV and the V+ handset is OK on this. Volume perfect.
Why has the TiVo data base not included the Goodmans codes shown on picture 2 ? If 1720 is not included, my TiVo handset will never work.