The church was one of the original three built for Aldershot camp in 1854. The following comes from the listed building description, but I suspect it has now been demolished. It may be that the memorials were transferred to the current garrison RC Cathedral (St Michael and St George). I will take a look - if it is open (rare).
HOPE GRANTS ROAD
St Michael and St Sebastian
(formerly listed as
Former Roman Catholic
Church under Aldershot
Camp, Knolly's Road)
SU 85 SE 2/39 20.8.79
1856. Formerly the Roman Catholic Garrison Church (now moved to St Michael
and St George), now returned to MOD and used as a store. The survivor of the
three first camp churches, of similar appearance (one in the North Camp,
demolished 1969 ; the other South Camp church was known as the Iron Church,
last occupying the present site of St Andrews, Queens Avenue, and of similar
design to this building.
Simple structure of 9 bays, with a low-pitched roof covering the nave and
aisles. The fabric roof is surmounted centrally by a timber turret, having
a pyramid roof, brackets at eaves, and vertical board cladding. Each external
bay is marked by a vertical, enclosing horizontal lap-boarding with a projecting
cill band. Triple windows have round heads, diagonal leaded lights contain
multi-coloured glass. The east end is plain, with blank framing at ends of
aisles and nave. The west end has a central group of 5 windows (rising in
the centre) and triple windows on each side. There are three plain arched
doorways, the centre projecting as a porch. The interior has a light timber
framing archbraced, with some cast iron brackets.