British Land is splitting its £310m retail park portfolio sale from the Hercules Unit Trust.
CBRE was originally instructed to market the portfolio, known as Project Orange, in February, but Cushman & Wakefield has now been brought in to market three of the shopping parks on an individual basis.
CBRE will continue to market the trophy asset, the 575,000 sq ft Parkgate shopping park in Rotherham, Yorkshire, for £190m.
The three parks to be marketed by C&W are Hatters Way in Luton, Bedfordshire; Crown Wharf in Walsall, West Midlands; and Hylton Riverside in Sunderland, Tyne and Wear.
They are valued respectively at £20m, £70m and £26m. British Land became majority owner of HUT last year, increasing its stake to 66%, but decided to sell out at the beginning of this year.
