He works away from home a lot and doesn't find that much time to practise. He has a weekly lesson and enjoys playing Baroque/ Classical/ Jazz and Pop styles. I am looking for some suggestions of pieces a maximum of 2 pages long. Thanks.

Baroque:
Many pieces by Couperin are quite short, most of the Preludes from Bach's 48 come in at 2 pages long, as do his 2 and 3 part inventions (of which all are finely crafted, and a few are extraordinarily beautiful).

Early classical:
Lots to choose from: Sonata movements from Clementi, J C Bach, C P E Bach, early sonatas by Handel, pieces by Kullak, Gurlitt, early Mozart, Beethoven Op 79 second movement (the only Beethoven sonata movement I can think of that makes sense performed alone,and is 2 pages long or less), Selected Beethoven Bagatelles Op. ww and Op. 119, and much much more

Jazz:
Nicky Iles '"Jazz on a Winter's night" is a good place to start. Then progress to albums of pieces by Fats Waller, George Shearing, Art Tatum,Duke Ellington, Billy Mayerl, Bill Evans - whoever your favourite Jazz artist might be. It is pointless to specify particular books as they are constantly going out of print and being replaced with new anthologies.

Pop:
Like jazz, anthologies are constantly going out of print and being replaced with new selections. The "Hits of the 20s/30s/40s/etc." and similar titles you may find to be very good or disappointing, depending on your musical tastes. On the other hand a full album of songs by The Corrs, Aerosmith, or the Rolling Stones, might be too much to digest! Finally, car boot sales can turn up moderately priced original sheet music of popular songs.

Thanks for your suggestions.

Satie? The Gymnopedies and Gnossiennes of course, but there are several others, such as the Pieces Froides and Preludes Flasques.

Bach 2-part Inventions, also the Haydn Divertimenti.

Schuberts Moments Musicaux include a couple of pieces that are possibly suitable, too.