5th ERS North Sea rescue mission 20 March 1945

On 20 March 1945 an OA-10 (Catalina) of 5th ERS reportedly was sent to pick up an RAF Walrus crew that had run into trouble when trying to rescue a ditched Spitfire pilot off the Dutch coast (The Hague).
The Walrus had to be sunk by Allied fighters (P-47s of 5th ERS?), but the OA-10 was also unable to take off due to damages and a heavy sea. After a long stay in the water, the a/c was towed back to England by motor launches. 
5th ERS station was RAF Halesworth  at that time.
 
Info about the crew and serial of OA-10 involved is welcome, thanks.
 
Regards,
 
Leendert