The information has been taken out of context. There are three new designated areas over Central London which are restricted up to 1400ft to helicopters and fixed wing aircraft. This will not have an appreciable effect on low level operations in the London and London City Control Zones, since ATC does not normally issue clearances in these areas below 1500ft anyway. There may be a minor effect on traffic spotters, but there should be little impact on the heliroutes. Since the airspace in question is Class A and Class D, pilots are required to contact SVFR or Thames Radar for an ATC clearance to enter. Therefore all traffic in the London area will be known to these agencies. Any unidentified traffic is tracked on radar, and appropriate action taken.