For Canadian pressings, please use Phonodisc Limited.
Previously administered by Philips Records Ltd., the plant operated under the name Phonodisc Ltd. from 18 March 1969 until 2 February (registered 11 May) 1979 and was then renamed to PRS Ltd.
During the '70s the plant also pressed 7"s with large centre holes ("dinked"); these titles require separate entries in the database, distinguishing them from the push-out or solid centre editions.
In late 1971, Phonodisc started to produce injection moulded 7" for selected UK Philips and Polydor singles, which became standard in/after 1973. Usually, those records carry Made in England on the centre and have a small spindle hole within a wide black ring.
Vinyl mastering is usually identifiable by ▽ and //420 in the matrix (e.g. 278838 1F//1▽420). There are occasional exceptions to that rule though: sometimes the triangle or the '420' may be omitted or replaced by a letter (e.g. 267921 1F//3 420 or 269753 1F//3 X), or the two forward slashes are missing. Being a full service provider, the records were normally also pressed there. In those cases, the centre labels always carry a "Made in England" (i.e. when missing, the record was pressed somewhere else).
Because Phonodisc had few lathes only, it was common to outsource the lacquer cutting to other studios. The studios can be identified by one or two letters following the "//" and the number of the cut (e.g. //3 M). The respective mastering studios are:
//x AB = Abbey Road Studios
//x AZM = Allen Zentz Mastering
//x E = EMI Studios
//x C = CBS Studios, London
//x D = Decca Studios
//x IB = I.B.C. Studios
//x G = Portland Studios
//x K = Kendun Recorders
//x M = Master Room
//x MC = The Music Centre, Wembley
//x MCN = Master Control, Nashville
//x MD = Masterdisk
//x ML = The Mastering Lab
//x P = Pye Studios
//x ST = Sterling Sound
//x STR = Strawberry Mastering
//x T = Trident Studios
//x TO = Tape One
//x UT = Utopia Studios
1F/2F, 1Y/2Y, 1L/2L etc. before the "// ∇ 420" are format indicators only, which differ from the Dutch identifiers.
F after the side identifier (1/2) stands for 7" 45 RPM Mono (until 1969, and since 1970 for 7" 45 RPM in general)
L after the side identifier (1/2) stands for 12" 33 1/3 RPM Mono (until the end of the 1960s)
W after the side identifier (1/2) stands for 12" 33 1/3 RPM Stereo (later replaced by 1Y/2Y)
Y after the side identifier (1/2) stands for 12" Stereo (regardless the speed - LP and 12").