Background: Orchestral Manoeuvres in the Dark (OMD) are an English electronic music band formed in Wirral, Merseyside in 1978. Spawned by earlier group The Id, the outfit is composed of co-founders Andy McCluskey (vocals, bass guitar) and Paul Humphreys (keyboards, vocals), along with Martin Cooper (various instruments) and Stuart Kershaw (drums); McCluskey is the only constant member. OMD released their debut single, "Electricity", in 1979, and gained popularity throughout Europe with the 1980 anti-war song "Enola Gay".
Context: Founders Andy McCluskey and Paul Humphreys met at primary school in Meols in the early 1960s, and in the mid-1970s, as teenagers, they were involved in different local groups but shared a distaste for guitar driven rock with a macho attitude popular among their friends at the time.  By 1975 McCluskey had formed Equinox, as bassist and vocalist, alongside schoolmate Malcolm Holmes on drums, while Humphreys was their roadie. During that time McCluskey and Humphreys discovered their electronic style influenced by Kraftwerk. After Equinox, McCluskey joined Pegasus, and, later, the short-lived Hitlerz Underpantz, alongside Humphreys. McCluskey would usually sing and play bass guitar; roadie and electronics enthusiast Humphreys graduated to keyboards. The pair shared a love of electronic music, particularly Brian Eno and Kraftwerk.  In September 1977, McCluskey and Humphreys put together the seven-piece (three singers, two guitarists, bassist, drummer, and keyboard player) Wirral group The Id, whose line-up included drummer Malcolm Holmes and McCluskey's girlfriend Julia Kneale on vocals. The group began to gig regularly in the Merseyside area, performing original material (largely written by McCluskey and Humphreys). They had quite a following on the scene, and one of their tracks ("Julia's Song") was included on a compilation record of local bands called Street to Street. Meanwhile, Humphreys and McCluskey collaborated on a side-project called VCL XI (named after a misreading of a valve from the diagram on the back cover of Kraftwerk's Radio-Activity album; the name of valve is actually written with Arabic numbers, VCL 11, and not Roman numerals). This side-project allowed them to pursue their more bizarre electronic experiments, often working with tape collages, home-made kit-built synthesisers, and circuit-bent radios.  In August 1978, The Id split due to musical differences. The same month, McCluskey joined Wirral electronic outfit Dalek I Love You as their lead singer, but quit in September.
Question: Who was in it?. Whats the answer?
schoolmate Malcolm Holmes on drums,