Greetings,
I stumbled across this thread (and this site) when Googling for background on Anthony Scott. (A copy of his Toccata & Fugue in A minor recently came my way and I have since played it at a recital in St. Nicholas Newbury). I have been the organist of St. Michael & All Angels Lambourn since 1993. I am happy to report that the organ is in reasonably good condition, if you ignore the rattles from the pedal couplers. For many years it has been in the care of John Budgen.
The Scott rebuild in 1962 was the last major overhaul. As others have mentioned, the original Great Orchestral Oboe was removed then in favour of a (quint) Mixture. The only other change was the replacement of a Swell string and voix celeste (dating from the 1920's? when they replaced the original Willis Sesquialtera) with a new (non-Willis) Sesquialtera. So in 1962 the specification was only one stop different from 1858.
Since 1962 there have been 3 changes (in the time of my predecessor, Norman Wilson):
1) Addition of a reversible Great to Pedal foot pedal, aesthetically in keeping with the original 4 Great/Pedal composition pedals
2) The pipes of the Swell Sesquialtera have been "shuffled" (reversibly I am assured) to create a quint mixture
3) The Choir Dulciana has been "detuned" to create a Vox Angelica effect
Sir George Martin did indeed play the organ - he was 14 when it was installed, and every week rode to Oxford for an organ lesson from John Stainer. I like to think that Stainer must have visited Lambourn at least once to try out his pupil's new instrument. Martin succeeded Stainer as organist at St. Paul's.
I have searched in vain for any evidence of the beer supply system.
