Appie WW2...Do you have anymore recollections or flight souvenirs from your brother. Am I correct that he wasn't VIP (he had waited 15 months in Sweden) so not high priority to fly to the UK (but more important than ball-bearings :-) ).
Some impressions of the Mosquito flight conditions here
RAFCommands Archive :: Researching BOAC Operations and Pilots
Interesting that he was carried on a single passenger Mosquito when the Sonnie airlift from Stockholm to the UK using 30-passenger Liberators had been running from April 1944
Operation Sonnie: for Norwegian interest [Archive] - Luftwaffe and Allied Air Forces Discussion Forum
As said previously there are copies of Blockade Runners around (from about 55 euros)