The choir group Crystal Chords surprised shoppers with a Christmas carol.
Dogs Trust, the UK's largest dog welfare charity, has teamed up with Dermot O'Leary to urge the public to stop and think before browsing online for a puppy this Christmas. The TV presenter and dog lover is supporting the charity's 2011 Christmas campaign by warning about the pitfalls of picking up a quick puppy purchase.
Bright One is holding a fundraising event called The PR Prom at Shoreditch Town Hall on 19 January, which will see 500 PR professionals lend their support. For information, go to prprom.org.
The Times has announced its support for the 750,000-plus people living with dementia in the UK, by choosing Alzheimer's Society as one of its three Christmas charities. The appeal launched on 1 December.
Earthwatch won the gold award in the best Green Employee Engagement category at the International Green Awards on 24 November at the Natural History Museum, for 'Engaging HSBC Employees in Sustainability'.