Presumably the 145, as the advanced trainer, is destined to replace the 139 at SARTU (or whatever it will be called) for basic SAR trg.
ISTR the Met Police wanted to do winching with the 145 but the aircraft didn't have the OEI performance to allow training in a 'Safe Single Engine' condition.
Will we have the comedy of military winching training only conducted when the wind is strong enough to meet OEI hover performance?
I can't imagine any DDH, ODH or SDH signing off the risk to life to operate live winching when an OEI hover (or safe flyaway) can't be achieved.