"where, in circumstances other than those mentioned in paragraph 25.1.1, ….. such a teacher loses his post or would (but for this paragraph) suffer a diminution in his remuneration, and is thereupon employed full-time as a teacher in the provision of primary or secondary education: (a) in a post (whether or not at a school) in which his remuneration is paid by the same authority as before; ….. ..….he may, at the discretion of the authority or (as the case may be) the governing body of the ……..school by whom he is paid, be deemed for all salary purposes to continue to hold the post he held, and to be entitled to those allowances listed in paragraph 25.1.4 to which he was entitled immediately before the circumstances occurred; and the authority or such a governing body shall not unreasonably refuse to exercise their discretion in this matter in favour of the teacher;"
"We cannot accept that the temporal limitation was itself unlawful."