wonder what happened to them?
According to
the UK Serials site, 409 went to Llanbedr in 1994, 430 went to Manston Fire School and "perished" in Jan '90, while 727 became 8661M (is that an engineering training number?) and then to "Richborough, Kent" (??) in 2007.
That site also has pictures of 409 at Rhoose in SAR yellow (presumably):
and 727 in Shawbury (2 FTS) colours:
727 was at Ternhill (CFS(H)) in 1970 - cos it's in my logbook a few times (me as a Stude).
[with apologies for any copyright infringement!]