It is still pretty much the same, although there have been some changes. From memory:
A route which used to pass along the M4 east of Heathrow has gone, to avoid mutiple TCAS warnings on the big birds into LHR.
There have been one or two changes in names of reporting points, and one or two added.
The standard altitudes of parts of one or two routes have changed.
Recently a number of restricted areas have been added to "protect important parts of London from terrorist activity". In fact, they do not affect you if you stay on the routes, but you would be well advised to know where they are.
The frequenices to call for clearance will also have changed
All the information is on the new heliroute chart, plus the AIP. A more digestable summary of the AIP is in Pooleys.
Hope this helps