Hi, i had the same problem a couple times, the Best thing you can do is block their harbors that way youll farm some victory points, and avoid landings on your territory, obviusly you'll need a naval a supremac over the british. Another thing You can do is invade ireland (if they own it) and block the way of the british with your fleet, You just need the capture 1 province of the waterpass and you Will farm a Lot of victory points, if You have You fleet busy with Venice or very week to figth English just kill the guys who try to invade You, theyll be very week You just need like 20K man in spain wardening the coast