I'd be interested to know who your source is as cabin crew manager at LGW said no external recruitment planned at all at the moment as LGW base is shrinking. LH LHR is overcrewed - SH LHR is undercrewed but around 120 transfers from LGW (phone calls happening as we speak) should fill the gaps there.
There may be recruitment for other bases or B'med but I don't know about that.
The rumblings are that any future recruitment will be for SH at LGW (my fleet - you lucky people!!! MUUUUHAHAHAHAHAHHAHA!!) and then this fleet will feed the rest of the mainline community to give everyone a fair chance to reach the nirvana of LH LHR. But bare in mind that you will have to join the bottom of the pile at SH LHR first after you transfer from LGW (after about 3 years) then you looking at at least another 5-7 year wait at SH LHR before getting the chance to transfer to LH.
And as for fresh blood - CFE were merged with us this year, an influx of over 600 crew!!!!! How much more fresh blood can we want or take?