The proposed ESA radar for the UK is different to the one in the photographs. Very trick looking. Fitting this will require strengthening of the forward bulkhead due to the weight of the T/R cells that make up the front end of the radar. I`m not sure if the early jets can be modified to take it.
I remember seeing an EJ with a working vectoring nozzle on the Rolls Royce stand at Farnborough a few years ago. This was supposed to be fitted to the tranche 3 jets now in production.