Bumblebees infected with honeybee diseases
20 February 2014 Last updated at 08:06 GMT
Researchers have found that two diseases harboured by honeybees have spread to wild bumblebees, sparking concerns as many bumblebee populations are already struggling.
Insects infected with deformed wing virus and a fungal parasite called Nosema ceranae were found across England, Scotland and Wales.
Rebecca Morelle reports.