Staff at the Driver and Vehicle Licensing Agency (DVLA) are to be asked if they would support further strikes in a long-running dispute over coronavirus-related safety.
Members of the Public and Commercial Services union (PCS) at the agency's offices in Swansea have been taking industrial action over safety measures.
The DVLA insists it has put measures in place to keep staff safe and has been following official guidance.
A consultative ballot of PCS members will open on Wednesday (August 11) and close on September 3.
Members will be asked about their priorities for a deal to end the dispute and whether they would support further strikes and action short of a strike.
Another ballot would have to be held before further strikes could go ahead.
PCS general secretary Mark Serwotka said: "DVLA senior management and the Department for Transport have underestimated the resolve of our members. They thought support for our strike would fade when in fact it is growing with new staff joining PCS.
"This dispute can be resolved if the original deal to end the strike is put back on the table."
For more stories from where you live, visit InYourArea.
