1. The union imposed an overtime ban in protest at the sacking of two workers.

2. An overtime ban started at 7.30am yesterday and will affect the company's factories at Llandudno Junction and Bodelwyddan.

3. It is thought that a complete overtime ban will go ahead.

4. On October 31st, 1983, an indefinite overtime ban was called in protest against pit closures.

5. In 1996 a national overtime ban by prison officers sparked off riots in seventeen prisons.

6. Union leaders had urged miners to vote in favour of an overtime ban.