Beneficial Insect Nest Box – Bumblebee – MKW 3in1 – nest boxes and shelters for birds, bats and insects – nature protection with original boxes for wild animals on nestbox.eu
Build a Nest Box for Bumblebees : 5 Steps (with Pictures) - Instructables
How to attract bumbles to an artificial nest - Honey Bee Suite
Bumblebee habitat
Bumblebee Box by Nestbox Co
Beepol Bumblebee Hive from Plant Protection - Allotment Shop
A brief guide to bee nest boxes - Bumblebee Conservation Trust