How do you remove spark plugs from Renault kangoo?

Get a long reach plug tool from a good retailer approx £5.00

remove ht lead (just pull ) from top of each plug one at a time

Remove old spark plug replace with new plug (gap set as listed for each model in hand book)

replace H T Lead and move to next.

beware 18000 miles is a long time for plugs to be in and may be hard to be removed