WELLCOME supermarket's management said yesterday it would improve communication with staff as more protests were being planned at its busiest branches in a dispute over the formation of a staff union. More than 10 lorry drivers of the retail chain joined two colleagues, who claim to have been victimised for organising a union, to stage a sit-in outside a Nathan Road branch in Mongkok for seven hours yesterday. Mr Yeung Wing-kin, who was sacked, and Mr Lau Wing-fung, who claimed to have been demoted, protested for seven hours outside a Causeway Bay branch on Thursday. More protests were planned at the Granville Road branch in Tsim Sha Tsui today, at the same Causeway Bay branch tomorrow, and in Landmark shopping centre on Monday. The chain's finance and systems director, Mr Alastair McKendrick said more staff representatives would be allowed to meet regularly with management over staff benefits. ''We are in the process of changing the formation of the joint consultative committee to try to rectify any problem of internal communication, if it does exist,'' Mr McKendrick said. He said the number of staff on the committee would be doubled to 30. But the management would refuse to recognise the staff union, which was registered yesterday with a membership of seven.