Cheap but time-consuming alternative: bus (143?) to Brent Cross then 142
to Watford Junction or 221 from North Finchley to Edgware, the 142 to
Watford.

Get an all-zones Weekly Bus Pass and a good book.

This will take AGES...

or you could take an 82 bus to Finchley Road and the Metropolitan Line
to Watford (not Junction)

--
Helen D. Vecht:
Edgware.