Thanks, Tweedledee. I do have a couple of Oxford Service Music books, one for manuals, one including pedals, and also A Graded Anthology for Organ, Bk 2 and Manual Miscellany for Organ, Bk 1. They will keep me going for now, but I'm still tempted by the Organists' Manual, so I will put it on my birthday list for later in the year. At least that will stop me feeling guilty about buying it!
It now looks as though my G2 will have to be November instead of June - a combination of me and my organ teacher being away at different times, but it's still definitely on the agenda. I'm finding one of the pieces quite tricky as it switches manual in both hands several times, and my tiny mind can't cope with playing one line on the upper keyboard from the lower line of music, while the other hand plays the lower manual from the upper line of music. All part of parcel of organ playing, though, and it's exciting.
One thing that always surprises me about playing in Church (the very little I have done!) is how quiet the organ sounds compared with when I am in the building on my own, and also how quiet the congregation sounds as (like you) our organ loft is at the back of the Church. Another thing I have noticed is that on the few occasions I am brave enough to drop a pedal, it seems to barely sound in the organ loft, but is much louder in the body of the Church. Is that normal?