GBPCAD was 1.94 at the end of Feb. It's now 1.82.

Thing is, this is the Pound falling, not the Canadian dollar. The OP is just describing it wrong.

There's a degree of uncertainty over what will happen politically in the UK next month, so markets are discounting the Pound as a result.

Whilst the UK election clearly has no bearing on the strength of the Canadian Dollar, it is weakening the Pound.

To the OP - what's realistically going to happen from here - a move of 10% is probably about all.