Staff at a DIY store could be facing disciplinary action after pictures showing them wearing nothing but their work aprons were posted on an internet networking site.
Videos showing workers play-fighting in the aisles of B&Q, in Hartcliffe, Bristol, were also put up on Facebook, it was claimed.
The company has launched an internal inquiry after bosses saw the images, which have now been removed from the site.
The Co-op is launching a 6p shopping bag which can be thrown on a compost heap when it wears out.
Bosses say the bag â€“ made of polyester and cornstarch â€“ is the UKâ€™s â€œfirst fully-accredited home compostable carrierâ€.
They say the bagâ€™s popularity will be tested at selected stores in East Anglia before it is offered nationwide. The Co-op says stores taking part in the trial will not offer free plastic bags.