#NoFilter was the campaign theme for London Pride 2016. One of the organisers explained it as...

'It celebrates the spirit of Pride and asks you to do something very simple: Live your life as you. Many LGBT+ people feel in the need to filter their behaviour, to self-censor or to hide who they are. Well, not today. We’re encouraging people to live as themselves, nothing more, nothing less. So, stand proud, show us your authentic-self and celebrate authenticity. Live life with #nofilter.'
https://metro.co.uk/2016/06/22/nofilter-isnt-just-about-pictures-anymore-5960594

As you can see in this video an old London bus has been decorated for the 2016 theme 'no filter'. Rainbow flags can be seen on top of the bus and where the signs of where it is going show the words 'stand out', no filter and 2016.

Loud music can be heard blasting in the back and people chattering and cheering.