Drivers on the M4 will find themselves among a convoy of up to 200 lorries tomorrow.

Truckers from the West and Wales will take part in a protest drive to London.

The protest is part of national demonstrations calling for further Govern-ment concessions on fuel duty.

The lorry drivers will meet the convoy currently making its way to the capital from the North East for a rally in Hyde Park.

About 50 hauliers met at a pub in Coalpit Heath, near Bristol, on Saturday, and unanimously agreed to continue with the protest.

Two months ago, the country was brought to a standstill by fuel protests.

Angry hauliers blockaded oil refineries, cutting off supplies to filling stations, whose tanks soon ran dry as panic buying broke out.

The organisers of that protest said at the time that they were prepared to give Chancellor Gordon Brown 60 days to cut fuel duty.

In his pre-Budget statement, Mr Brown announced a freeze in duty until 2002 and cuts in road tax for HGVs, but many lorry drivers have said this does not go far enough.

There have been protest drives to London before, but the Metropolitan Police says it will not allow the protesters to enter the centre of the capital.

Organisers of the rally said about 100 Welsh drivers are expected to gather at Aust Services near the Severn Bridge tonight.

They say tomorrow's drive would not take the form of a "go-slow".

They also claim that the contingent from Wales and the West would dwarf the turnout for the protest drive from the North East, which has so far attracted about 30 vehicles.