I've had some good news, I was reading the Chinese Embassy website and it looked as though Group Tours of less than 2 days from HK could be exempted. I decided to contact the local tour operator, rather than Viator (International booking agents), who confirmed that they sorted out a Group Visa - That's saved me another expense of £65
Fw: Viator #XXXXXXXX - Guangzhou (Canton) China Day Trip from Hong Kong
Dear Mr XXXXXXX
Thanks very much for your email message .
Please note that China group visa is included in the tour and we will arrange the group visa in resort . You do not need to apply China visa yourself . But for your information that we need to have three more clients in order to apply the China group visa , chance is good because we still have time ...
We will keep you updated .
With best regards