As Retro Pedro says, the Royal wedding should not cause any problems for you provided you stick to the motorways.
The best source for traffic info around London will be radio.
In Kent, Heart on 103.1fm or 102.8 for the M20 & M25
After the Dartford Toll Tunnel (it's £1.50 so try to get some change on the Ferry

) Change to Heart SX on 102.6fm
Both these stations usually have travel news every 15min throughout the day however this may change due to the royal wedding.
If you have internet access on your travels you can check the motorways at
http://www.trafficengland.com/motorwayf ... t=true#mtfThis provides real time data on the roads.
If using the M11 route then I would only expect queues at the Dartford tunnel tolls and on the M25 between junctions 29 & 28 (road works), but they should not add any significant time to your journey.
I cannot comment on the M1 route as I do not know of any problems currently on it which may affect your journey.
Hope this helps, and have a safe trip here

Any other questions please ask
