So on the flute I'll definitely be playing part of Mozart's Concerto in G which will be around 18 minutes, then I'll have to play for 14-20 more minutes. Would it be better to balance this with three shorter pieces or two? I was hoping to play the Chaminade Concertino (8 minutes) leaving me with 6-12 minutes which I could at a stretch fit in the Handel Sonata if I leave out the repeats as the syllabus suggests, however the piece is fiendishly difficult and I feel like all the musicality is lost if I leave out the repeats. So I could instead replace the Handel with a piece by Burton, however it's quite similar in style to the Chaminade and I feel like my programme should have some baroque in it because it's such an important part of the flute repertoire. Also this programme wouldn't have any unaccompanied pieces and I don't know if this is a bad thing? The only unaccompanied pieces to my knowledge are another classical one and a 20th century one which would clash awfully with the other pieces I was planning on doing.
Is it worth sacrificing a better balance of styles and moods for more technical security and musicality? I hate having to choose a programme, I'd be 100% comfortable with any of the pieces I play except for the Handel which will take an awful lot of work to get up to standard needed.
I'm not a flautist or recorder player, but I did and successfully passed the ATCL Performance (Piano) recital option.
I think it's important to have at least one substantial work. It seems like you're trying to fit in two, by playing the Chaminade. Whilst I understand you like the piece, I do think you should consider dropping it, if the Handel is hard and doesn't make sense to you without the repeats. A broad programme spanning all the different musical eras is important I think, to show versatility.
That said, ultimately you mustn't compromise the standard of the recital.
Just some thoughts there