The change is basically a loss of resilience for the Chesham punter, at
the moment if the met is broken they can get the Chiltern to Chalfont &
Latimer to get the shuttle, now if the Met is SNAFU so is everyone
living in Chesham....the next step closure?

Jack Taylor wrote:
Mizter T wrote:
I suspect they were
talking about those very same peak time trains that don't stop at
Amersham - though did they ever stop at Amersham in the past and this
stop was later withdrawn?

No, the service pattern has been virtually unchanged since the 'fasts' were
added in. One (the 17:53 ex Marylebone) did stop at Harrow then Amersham at
one time. The current 17:48 is first stop Amersham.

I'm guessing that Moor Park didn't feature in the 'Passenger Service
Requirement' that you mentioned earlier? Or might the Chiltern service
there have been withdrawn by mutual consent of Chiltern and LU?

I suspect both. It was around 1996 when the Moor Park stops were withdrawn.

Regarding the 'trip-cock' tests, up trains running onto LUL at Amersham have
to pass the station at reduced speed to avoid failing the trip-cock at the
end of the platform - which does tend to attract the unfamiliar LUL
passenger, walking towards the train as it slows and then getting frustrated
when it doesn't stop. In the down direction, running off LUL (actually not
quite, the boundary is a mile further on, at Mantles Wood, but the third
rail ends just beyond the station) it is quite common for the Chiltern
services to pass at full line speed.