2016-12-08 - Rider Down, Stamford Street SE1 9NH 20:14, Velocio

Is there a chance to obtain CCTV?

This is key. @Velocio is someone already on this for you? You'll need to identify and public or private CCTV from the scene and make a subject access request under the data protection act to all the companies get the footage. They'll need a time, location, and description of you, and will probably charge you £10 for the privilege.

I'd get this done sooner rather than later, and wouldn't rely on the police to do it as, errr, it's admin.