CF-HML was one of five Mosquitos - 'HMK to HMO - acquired in Britain in November 1954 by Spartan Air Services of Ottawa. They were used for high altitude photographic survey, mainly in the Arctic. A month later they purchased five more - 'HMP to 'HMT. The price was $7500.00 CA per batch of five.
That same company also operated a handful of P-38's and, briefly, a DH103 Sea Hornet in the same role.
I don't know if the Mosquito in the museum in Ottawa is airworthy. I'm guessing it isn't, but Davaar would know for sure, as he's on the board of that institution.