For the LTCL recital programme, the programme itself needs to be between 37-43 minutes. The exam length is 45 mins in total. Yeah as per symphonicdance, do need to pay attention to the minutes. Even in the guidelines, have to be rather precise in your timing of the pieces even in the programme notes. Also need a bit of a balance in the types of work, to try to include from most if not all periods. While it need not be in chronological order, it does need to be coherent ( again, stated in the guidelines). I had to re-work my repertoire a few times, and took me 1.5 years to prepare for it. (adult student, life, work, family etc not easy as when you're a teenager or young student! ) I'll let you know once I sit the LTCL exams in 2 weeks!
My silly opinions only.Subject to the choice of works, but generally speaking, a candidate should consider to play his/her most confident piece to start the recital, and play the piece with a sonorous ending as the last piece.Nonetheless, playing in the sequence of "period" or in the sequence of the completion year of the work usually won't get criticized. It is also interesting that a candidate to have a programme comprised of works all in major keys or all in minor keys. Nonetheless it could create a bit danger, but not as serious as to have all in the same major/minor key.