Service patterns along the Dartford/Medway routes in past

[route53]

From my understanding of old service patterns on the Dartford routes until the 70s/80s that is the patterns were like this:

GREENWICH/WOOLWICH LINE:
1: 2tph London to Dartford
2: 2tph London to Gravesend
3: 1tph Charing Cross to Gillingham//Maidstone, the original fast service which ran fast to Woolwich Arsenal, Dartford, Gravesend and Strood before splitting

BEXLEYHEATH LINE:
1: 1tph London to Dartford
2: 1tph London to Gravesend
3: 1tph London to Gillingham all stations except New X & St. John’s I believe

SIDCUP LINE:
3tph London to Dartford

While it seems that the longer distance skip stop/fast services ran via Greenwich, Woolwich & Bexleyheath, the Sidcup had the most basic service, which is now a reversal of fortune as now the facts run via Sidcup and the stoppers now run via Woolwich & Greenwich, even though the Woolwich/Greenwich trains still run further out the the Sidcup and Bexleyheath lines.

No Victoria services until the 1980s in the peaks and these I think ran to all Dartford routes until around 1990 when the Bexleyheath line was the only line to serve Victoria.

Were there any regular services from Blackheath to Woolwich before the 1970s? Which was when the fasts were diverted to call at Lewisham and Blackheath or were they only peak journeys only?
Did any train ever reach Tonbridge via Gravesend?