The Games Maker Choir was set up by a group of enthusiastic Olympic volunteers during the London Games.
University student Victoria Verbi decided to set up a choir within the Olympic Park - and within two days of putting a notice in the volunteer newsletter, she'd gathered a group of more than 200 singers.
After one brief rehearsal, the choir performed at the bandstand in the Olympic Park.
More top news
Stamp duty is to be abolished for first-time buyers on properties up to £300,000, Chancellor Philip Hammond has announced in his Budget.
The money will help pay for mental health and counselling services, regeneration in the west London neighbourhood and a new community space.
The small device was hidden in a grate in the ceiling in the only customer toilet at a Starbucks coffee shop.