Eridge Green is the village nearest to Eridge Castle, seat of the Marquesses of Abergavenny, who have taken a keen interest in the church and were probably instrumental in securing the establishment of a parish, formed in 1853 out of parts of Rotherfield and Frant (KD 1874).  A strangely modest church had been started the year before (B 14 p425); the architect is unknown.  It has been altered extensively, so its original appearance cannot be easily ascertained.  By 1875 £3500 had been spent from private sources (PP125), that is the Abergavennys.

Built of rough local sandstone with a tiny south tower-porch, it is more like a school.  The original parts of the building suffered from damp (BAL/MSS DeJ/3/4), but replacement never seems to have been considered.   The earliest known change is the big five-light east window of 1893 (BN 64 p468).  However, J L Denman transformed it between 1948 and 1955 for the then Marquess, for whom he had in 1938 designed Eridge Castle.  Hampered by post-war building restrictions, he could not change the low proportions, but his papers (BAL/MSS DeJ/3/1-4) and article (see 1) chronicle the work.  In 1948-49 the roofs were ceiled and a north transept was adapted as a vestry.  Two years later he altered the west end with a private pew for the Abergavennys, behind a broad arch.  He also adapted the baptistery from an existing vestry, with a new arch to the church.  A three-light north west window and new gates in the churchyard date from 1954 and Denman also added single-light windows either side of the east one.  He designed the fittings at various times, mostly in light oak – the main ones are listed below.

Fittings

(All are by Denman unless stated otherwise)

Altar rails: 1948.
Font: 1950 of Sussex marble by J Cribb (1 p244).
Glass:
1.  (East window, four main lights) Lavers and Westlake, 1894 (BN 64 p468).
2.  (Lancets flanking the east window) C Knight, made by Cox and Barnard, 1948 (1 p242).
3.  (South nave, second window) Burlison and Grylls, 1939 (CDG April 1939).
4.  (Baptistery) C Knight, made by Cox and Barnard, 1950 (1 ibid).
5.  (North nave window) Memorial window to the Earl of Lewes, H Powell, 1966 (signed).
Lectern: Designed by Denman, who may have been responsible for alterations to it in 1965.
Reredos: 1948.

Source

1. J L Denman: Holy Trinity Church, Eridge Green, Sussex, B 190 (1956) pp242-44

My thanks to Nick Wiseman for making the photographs available