Of interest to some of us, route number 203 was used during
the war for a summer-only route between Epsom and Chessington Zoo,
not via the Country 468 route, but via Malden Rushett.
However, the Stanwell 203 was a post-war invention.
To provide Stanwell with a bus service on Sundays,
a service into Staines had been operated since October 1934,
when Monday to Saturday route 506 was renumbered
224 and introduced on Sundays. Apart
from a short spell during the war when renumbered
223, he service continued as the 224 until March
1948, when new double-deck route 162, running solely between
Stanwell and Staines, took over daily. The route had
thus gone from OMO Darts and Cubs, via crew-operated Ts, to
double-deck ST and RT-types.
Meanwhile, the 203 was introduced in February 1951 with STLs
to serve new roads between Hounslow and Hanworth via Whitton.
Within six months, the western end had been extended to Hatton
Cross and the eastern end diverted to Twickenham. No doubt
the growing importance of Heathrow Airport was a factor; at the end
of 1952, peak hour journeys were extended along the south side of
the airport to East Bedfont. RTs replaced the STLs between
1951 and 1954, in which year the Sunday service was
withdrawn.
Extract from 1964 bus map
© London Transport

In 1955, the Monday to Friday peak Bedfont
journeys were extended to Staines, along the main road. This
was the precursor to the wholesale extension to Staines, but
now via West Bedfont and Stanwell, from 27 Jun 56. This
routing runs parallel to the modern road from Terminal 4 to the
Cargo Area, just on the far side of the Duke of Northumberland's
River. A Sunday service was re-introduced, but covering only
the Stanwell to Staines section and allowing complete withdrawal of
the 162. November 1959 saw the introduction of Monday to
Friday route 203
A, taking a different route through
Stanwell, running to Ashford instead of Staines and sharing
the 203 allocation.
OMO working had been reintroduced into the Central Area by the
conversion of four routes in 1964, with a further two (
237 and
251) in January
1965, but thus far only by conversion of existing RF routes.
A precedent was therefore set on 4 Jul 65 when the Sunday 203
operation was converted from RT to OMO RF.
This 17 minute service had required only one bus since 1952,
the timetable showing no evidence of the garage working running in
service. The service was worked from Hounslow Garage,
as the Stanwell Sunday service had been since 1934
(except for a period when Uxbridge took over during the war) and
would have used an RF spare from the 237. What the timetable
does show (4 Jul 65 panels
westbound and
eastbound) is the meal break on each of
the two driver duties being taken in Staines Garage, which was
of course part of the Country Bus & Coach department. The
driver change would presumably have involved a
journey down on the 116.
For no obvious reason, New Year's Day 1967 saw a change of
garage (of the Sunday service only) to Fulwell, no further
away but less easy to get to. As a result, there was a gap in
the afternoon service while the bus returned to Fulwell for the
crew change, all four garage journeys now being shown on the
timetable (1 Jan 67 panels
westbound and
eastbound). The 116 and 285
roads were used for these. Staines Garage was still used for
meal breaks, but now one journey at each break ran dead between
Staines and the garage. (Sorry about the detail, some of us
like this stuff.) But obviously the Sunday traffic continued
to reduce, and was withdrawn without replacement on 13 Jul
69.
Meanwhile, although the weekday RT service between Twickenham
and Staines continued to be operated by Hounslow Garage, RFs still
had a part to play in the 203 story. In September 1970, the
Hounslow to Twickenham section was replaced on Monday to Friday by
new Hounslow RT route 202, which was duly converted to OMO RF in
September 1971. The Saturday service meanwhile was extended
beyond Twickenham to Richmond Dee Road, until in March
1972 the Hounslow to Richmond section was transferred to the 202
which was working the identical route on Monday to
Friday.
Whilst the 202 was OMO RF-operated, the March 1972 changes saw
the 203 and 203
A (which took on the off-peak workings)
converted to SMS operation, with the 203 diverted away from the
High Street in Stanwell to follow the alternative 203
A
routing along Clare Road. Perhaps the new buses could no
longer
fit?
The distinction between the 203 and 203A was lost
in 1976 with the introduction of Leyland Nationals, whose
three-track blind displays could not display suffixes.
Between 1978 and 1991, the route was extended eastwards to
Brentford. In 1996, Sunday working was reintroduced, giving
Stanwell (but not its High Street) a Sunday service again.
The route continues to operate daily between Staines and
Hounslow.