Delivery drivers gathered in Westminster over fears they are being increasingly targetted by criminals, including those who use acid.
It comes as five moped drivers were attacked last Thursday, with some suffering life changing injuries.
In response the Metropolitan police had this to say"
"The MPS can and will undertake pursuits in any situation where it is necessary to do so - in line with nationally approved guidance on pursuing motorcycles and in line with approved tactics.
However, we must first ensure the safety of our officers, the public and the suspect when bringing offenders to justice. Officers are appropriately trained and equipped to minimise risk and the MPS pursuit policy is based upon the National policing best practice guidelines. It is not true that if a moped driver takes their helmet off, they cannot be pursued by the police."