Canada Tax Questions Answered by Experts
The Consolidated Arrangements on Social Security between Canada and the United Kingdom came into force on December 1, 1995, and only cover residence in Canada being counted as periods of contribution to the UK National Insurance Scheme.
The Convention on Social Security between Canada and the United Kingdom (U.K.) came into force on April 1, 1998, and only allows Canadian employers to make contributions to CPP for work done in the UK.
Neither helps your case.
Another convention allows time spent in the UK to count as time spent in residence in Canada for the purpose of the 20-40 year residency requirement for OAS. However, that seems to require at least a year resident in the other country.
It doesn't look as if it will help you.