The collective deficit of defined benefit (DB) schemes increased by £40bn to £460bn over August after falls in long-term rates, according to PwC's Skyval index.
All UK private sector DB schemes saw a £50bn improvement in funding levels on a funding measure in June, according to PwC's Skyval index.
The private sector's defined benefit (DB) deficit under IAS 19 remained relatively stable over May with the shortfall increasing by just £1bn, but a different measure showed a £20bn fall.
Defined benefit (DB) schemes saw a £20bn reprieve on their deficits over the course of March, PwC's SkyVal index shows.
Industry figures are expecting a host of de-risking insurance deals to be undertaken by "quasi-public sector" schemes in the coming months.
PwC has expanded its pensions practice with the appointment of a partner and four additional senior hires.