DCPC for C1 with grandfathered entitlement?

[GC8]

Pretty much covered this in the thread title: does a driver who has a grandfathered C1 entitlement require a DCPC to drive professionally after September?

Someone asked me earlier thinking that Id know as I have an HGV licence, but I wasn't sure. C & C+E drivers will need it obviously, but beyond this Im not sure as I hadn't (possibly incorrectly now) regarded C1 as a vocational category before...

Edited by GC8 on Tuesday 10th June 08:43

[GC8]

Thanks.