Search the Transport Canada flight training unit
database. Results can be narrowed down by province/territory and rating/licence. If you're on a budget, the cost of accommodation will be a major deciding selection factor. Harv's Air near Winnipeg, Manitoba, probably offers the best value for money all round. There's (very basic) student accommodation there.
Expedite the assessment for the Category 1 (ICAO Class 1) medical certificate. Normally, a valid/appropriate certificate is needed to a flight test. Under exemption NCR-006-2023 (valid until 28 Feb 2025), a CPL flight test can be done with a valid category 4 medical cert (non-ICAO, valid only in Canadian airspace). Search exemptions database
here. See relevant feedback from someone on this issue
here. There are half a dozen Canadian AMEs in the UK and another dozen in France: look for a CAME
here. If you're not already a Canadian resident, you can apply for a foreign licence validation certificate (
FLVC) based on your UK PPL. If you are already a resident, see CAR
421.26(8) for the restricted (foreign-based) PPL.
If you wish to apply for a
PGWP after training, you'll need to fulfil these conditions and the FTU must be a
DLI. Separately, if you are not older than 35 and hold a UK/Channel Islands passport, you can apply fairly easily for two work permits for 24 and 12 months respectively under the IEC (working holiday) "youth mobility" scheme.
Transport will endorse a Canadian licence with a multiengine aeroplane class rating
without further testing if you apply within 12 months of obtaining the same rating on a foreign licence.—CAR
421.38(3)(c)(ii).