Books photos about executed POWS June 1944

Wonder if anyone knows what these notes refer to?
(from the record of service forms)

All In the UK:

Proc. on Command to Special exercise 24Feb43 2CIRU

SOS to 2 Greek Bn 24Feb43 2CIRU

TOS from 2CIRU 25Feb43 2 Greek Bn

SOS to 2CIRU 18Mar43 2 Greek Bn

TOS from 2 Greek Bn 17Mar43 2CIRU (someone "circled the date "17")

(then back to RWR's 27Apr43)

Question:trying to find outwhatthe connection/reason for "Greek Bn" was all about. Maybe special extra skills training to take back to the RWR?

There is notation about 2 other "special" things, 1 a special "duty" and one a special "exercise" one of which was scratched out as "cancelled" The "Special Duty DEC 2, 1942" 11 days before leavingfor UK.

Anyhelp....gratefully appreciated! Thanks...Karmen