The Tories are proposing that the personal allowance rises to around £13,000 for pensioners from 2025 and keeps increasing.

The independent Institute for Fiscal Studies (IFS) think tank has pointed out that this is not so much a tax cut to prevent pensioners from being hit by a tax rise already happening.

The IFS estimates a third of pensioners, those on the old state pension or with limited UK work history, won't see any tax relief under the scheme.

The average pensioner could benefit by £300 a year, but low-income pensioners won't fare as well.

Analysis by BBC Head of Statistics Robert Cuffe found someone on the state pension alone will only save £29.40 a year by 2030.