OTTAWA -- British pensioners living in Canada are lobbying the Liberal government to make indexing their pensions to the cost of living a requirement for any future free trade deal with Britain -- an agreement that would have to be negotiated as a result of Brexit. Here's a by-the-numbers look at foreign pensions inside Canada, and payments abroad:

1.24 million: British pensioners living outside the U.K. and receiving benefits.

560,000: British pensioners living outside the U.K. in countries where their pensions are not indexed.

150,000: The number of those frozen pensioners living in Canada.

500 million: What the U.K. government estimates annual cost-of-living increases to those retirees with frozen pensions would cost in British pounds.

$865 million: Approximately how much the increases would cost the British government in Canadian dollars.

$544 million: Foreign pensions paid into Canada on an annual basis

200,000: Foreign pensioners in receipt of that money (as of 2012)

$169 million: OAS and CPP benefits paid to people living outside of Canada in 2015

$41 million: OAS and CPP benefits paid to 19,507 people living inside of Canada as a result of reciprocal social security agreements

$50 million: Estimated amount Canadian companies save annually through those agreements that exempt them from paying higher contribution rates for foreign pension schemes

With figures from Employment and Social Development Canada, U.K. House of Commons Library