Information about the use of facemasks

Why are Stena Line requesting face coverings be worn when Wales has indicated that they are not mandatory when travelling on ferries?

While they are not mandatory in Wales, the Welsh Assembly has recommended that they be worn by passengers when travelling on public transport. We would like to apply the same standards of care and safety to all our routes and to avoid confusion for passengers we have applied the mandatory face coverings rule uniformly across all our services.