Right now, but subject to change, if the total lump sum value of your UK Defined Benefit and Defined Contribution* pension plans is £30,000 or less you can withdraw the Defined Benefits amounts in cash and bring it to Canada. The amount transferred would be subject to tax in Canada.
*A Defined Benefit (DB) plan, is a retirement account for which both an employer and employee make contributions that promise the employee a set payout at retirement e.g. two thirds of final salary. You do not have your own retirement pot but instead have a defined income. A Defined Contribution (DC) plan is a retirement account where both an employer and employee make contributions to an employee’s own individual retirement pot – the employee has flexibility to take the income any way they wish but the amounts depend on how much was contributed and how those contributions were invested.