made a bit of a cock up

ordered some plugs to fit the knock sensors which arrived,
not thinking that the new knock sensors would be different being O/E rover fittment,
but yes,
the junior timer plugs i ordered for the knock sensors fit the blue ones that screw into the block,
but not the ones that are bolted to the block, (that i bought and have here now

any one know what ferkin plugs i need now to wire them up please
