The cut-off date for bids was scheduled for August 9, but a spokesman for Unwins said this week: “Offers are still coming in, so the deadline has been unofficially extended.”
The company issued a statement saying it had received “an encouraging number of first expressions of interest”.
Unwins would not confirm reports that former Sainsbury director Patrick McHugh was putting together a £100m bid for the company. McHugh helped launch Sainsbury’s online shopping vehicle Sainsbury’s to You and left the multiple in 2002.
Other potential bidders believed to be interested include Thresher Group, Bargain Booze and the Co-operative Group.
All bids are being reviewed by advisors Grant Thornton, which will pare them down to those it believes will offer the best return for shareholders.
Marketing director Ian McLernon said Unwins’ new Phillips Newman stores in Kensington and Battersea were trading well.
He added: “We have identified 50 sites for roll-out of the format.”