Dave, I've been away but while I was away I received a reply to an email, though not directly from the Friends of Happy Valley. This is part of the email from the Environment Officer at CCBC:
"The Friends of Happy Valley is a very new but committed group that formed about a month ago. Currently there are only 5 members and they have only had one meeting.
The aims of the group are to support the park in its annual bid for the Green Flag Award, liaise with the Parks Department to regularly update the aims and objectives of our existing management plan and reflect local need/want. They will also try to increase community involvement by hosting events and fund improvements by carrying out grant applications. They cannot however make any decisions regarding planting or grounds maintenance without approval from the Parks Department.
"We are more than happy to offer representatives from the Bumblebee Conservation Trust and Butterfly Conservation a place on the Friends of Happy Valley as a forum to discuss your views and any improvements you feel Parks need to take into consideration when establishing aims for the coming year."
I had emailed the Organiser of the Friends of Happy Valley, suggesting that the gardens could be enhanced by inclusion of plants to attract bumblebees and butterflies and offering to give them a talk on behalf of
the Bumblebee Conservation Trust. I also contacted
Butterfly Conservation and their local representative was interested in being involved too. She in turn contacted the people at CCBC who are concerned with conservation and biodiversity in this area, so that everyone could liaise to avoid introduction of potentially invasive plants.
I'll keep you posted of any progress.