The way things are at the moment, futher recruitment in the next year looks doubtful. There are hundreds of people who have been offered employment already and are in holding pools for the various fleets and are waiting for training courses.
The last major recruitment campaign was for permanent Eurofleet LHR, Single Fleet LGW and 11 month temporary LHR. Candidates were only allowed to apply for one fleet and candidates chose this at the time of application. There were some instances where people were offered places on different fleets than which they applied but this was fairly hit and miss and only happened if it suited the company.
The new, mixed flying fleet that they company is wanting to create at LHR could possibly create some employment (not necessarily on that fleet), if it gets the go-ahead, once the holding pools have been depleted but it won't be for some time, I would imagine.