Yet some of these unofficial strikes go on for months.

The workers had been on an unofficial strike since walking out on 7 July.

Only at the Marchlewski plant an unofficial strike council was created, with 26 members.

All 96 staff are out on unofficial strike.

Their operations were further severely affected during the mid-1970s by both official and unofficial strikes by dock workers.

Their earlier support for unofficial strikes in the coalfields, particularly in Kent, had also drawn upon them the attention of the authorities.

Workers participating in unofficial strikes over the use of foreign workers agree to return to work after a compromise deal is struck by Acas.

The unofficial strike of oil-rig workers in 1990 had as one of its major aims an improvement in safety.

The agreement came after an unofficial strike by counter agents that disrupted the travel plans of about 80,000 British Airway customers.

Contractors at the Sellafield and Heysham nuclear plants walked out in the ongoing unofficial strike action over foreign workers.

But unions would be effectively debarred from holding a strike ballot in support of workers already sacked for taking part in unofficial strikes.

Rather, they called for tax reductions, firmer enforcement of law and order and legislation to reduce the number of unofficial strikes.

I've got the low-down on the source from which the Commies draw their secret funds to prolong unofficial strikes.'

Those are the boys and girls who wittingly, or unwittingly, finance some of these unofficial strikes, and probably other Communist activities as well.'

An official strike is a strike organised and recognised by a labour union, as opposed to an unofficial strike at grassroots level.

He presented the rescue plan to employees today, as a second day of unofficial strikes disrupted operations at the airline's hub at Zaventem airport.

'By unofficial strikes,' hazarded Barney.

The story is about a factory worker who refuses to take part in an unofficial strike and is ostracised by the other workers as a scab.

Edna, who staged an unofficial strike when the factory was insufficiently heated and the women were instructed to work in their hats and coats.

From 3 January 1979 an unofficial strike of all TGWU lorry drivers began.

On Thursday, about 1,000 other airport workers - including baggage handlers, bus drivers, ramp workers and check-in staff, walked out, too, for an unofficial strike.

Communications in the United Kingdom are disrupted as the Royal Mail faces a wave of unofficial strikes.

His attempt to try to limit unions to a 5% pay rise led to widespread official and unofficial strikes across the country during the winter of that year.

Official and unofficial strike action by lorry drivers, rail workers, nurses and ambulance drivers precipitated a feeling of crisis in the country.

Today's Green Paper is expected to contain two separate methods of enabling employers to take action in the civil courts against the organisers of unofficial strikes.