Team Orientated Project and Task Management Software Service/Product

We require a Team Orientated Project and Task Management Software Service (that must be hosted specifically in the EU). It will need to meet the criteria as described in the "Request to quote" document. AHDB has recently established an in-house Digital and Design Team to eventually provide for all our communication needs. We therefore require a cloud based software solution to maximise the efficiency of project/task planning and the associated communications as well as long term planning and reporting. The service/product should already exist and be in use by an existing client base. Initially we anticipate there being up to 20 users but this may need to increase if other teams decide to participate in the same solution.