Oil leak

After an oil change my Rover has started to leak oil.After investigation it comes out of the lower plug(There are two,I pressume for oil temp and pressure) it's the lower one.

I don't know what to do should I take the socket out and will all the oil drain out:crying:or can I just disconnect it and repair the plug inside ?

Can't find them on RIMMERBROS:confused: or is it this http://ift.tt/1lwHTNx nr 16,but it seams the oil is coming trough the socket not from around!!!!!

Many thanks in advance

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