4d The answer is TIM MCINNERY
Blyton's dog is TIMMY.
This leaves CINNERN for nicer sort of sailors
sailors = RN (Royal Navy)
but CINNE is not an anagram of NICER...
12a Note addressing problem about new property programme (5,7)
The answer must be GRAND DESIGNS but I can't see how the cryptic clue works! Help please!...