tubechallenge.com

No takers yet? Clue: it's in the E4 postcode area.

Sewardstone

Correct! (Although maybe I should have included the hamlet of Sewardstonebury as well.)

http://hidden-london.com/gazetteer/sewardstone/

Easy one after a quick Google - who is the only UK Christmas number 1 artist to have also won an Oscar for acting?

Nicole Kidman. (Bob the Builder was nominated but sadly just missed out )

In similar vein, who got to Number 2 in the UK charts in 1956 and number 18 in the Albanian charts in 2002?

Norman Wisdom?

Correct - knew it wouldn't be difficult!

"Don't Laugh At Me" in 1956 and "Big In Albania" (with Tony Hawks and Tim Rice) in 2002.

GuyBarry wrote: ↑16 Nov 2017, 19:36 Nicole Kidman. (Bob the Builder was nominated but sadly just missed out )

My favourite trivia fact... Only five people have won an Oscar (for acting) and performed on a UK number one single: Frank Sinatra, Barbra Streisand, Cher, Nicole Kidman and Lee Marvin.

RJSRdg wrote: ↑16 Nov 2017, 23:15 "Don't Laugh At Me" in 1956

Actually peaked at number 3 in 1954, but I guessed it anyway

Only three players have scored in the final of the FIFA World Cup while playing for an English club. Geoff Hurst and Martin Peters in 1966 and...?

Emmanuel Petit for France in 98 while he was at Arsenal

How many/which stations MUST be visited twice in a FNC?

I don't think you have to visit any station twice? It may involve some implausible runs, but there is always a theoretical alternative to doubling back. Eg you could start Amersham - Chalfont - Chesham - run to Chorleywood to avoid passing through Chalfont a second time.

I was thinking Chalfont would have to be visited twice (in order for Chesham and Amersham to count) but you're right, it would be possible to catch a bus from Amersham to Watford!