British motoring organisations are predicting heavy traffic on Friday afternoon, as holidaymakers head to the coast and countryside for a Jubilee weekend getaway.

However, the traditional exodus from London is likely to be matched by an influx of visitors intent on enjoying Jubilee events in the capital.

An AA spokesman said routes out of London and the M25 would become particularly busy on Friday afternoon and traffic would quickly build up again on Saturday morning, with predicted sunny weather adding to congestion.

Road closures in the capital ahead of and during Jubilee events are expected to make parking even more difficult and the AA has advised people to consider using public transport instead.

Early start

An AA spokesman said: ''There will be less on-street parking available and that will have a knock-on effect on outlying areas.''

There was evidence that some holidaymakers had heeded the advice of motoring organisations to stagger their journeys, with the BBC's travel unit reporting several traffic black spots on Thursday afternoon and into the evening.

Predicted black spots

M4-M5 interchange M4-M25 interchange M3-M25 interchange M23 London-Brighton A303 in Devon M6 towards Lake District Source: RAC

The M62 between Liverpool and Leeds was badly hit and there were also major delays on the M1 and in Dorset as many people headed for coastal resorts.

The travel unit spokeswoman said Friday had started off more quietly but she also expected traffic to build up again later in the day. An overturned tanker on the M40 caused long delays on Friday morning.

"There will be a lot of movement generally across the whole weekend," the spokeswoman said.

The AA says it is sending out 100 extra patrol staff over the weekend to cope with the increased traffic, with the West Country a particular concern. ''The M4 and M5 interchange at Bristol is always very busy,'' the spokesman said. The RAC says it will also have extra patrols for busy periods.

Seaside warning

The AA spokesman said Tuesday would see another build up of traffic as holidaymakers returned home.

But school half-term holidays may help to reduce the congestion, with many families expected to extend their break.

Train companies in the south-east are adding extra carriages to services to and from London for Jubilee events.

The Maritime and Coastguard Agency said huge crowds were expected at seaside resorts over the weekend and warned tourists of the dangers of drinking and swimming, tides and slippery cliff edges.