Loft grow help!

hi guys been growing in the loft for the past 5 or so months , its an unisulated loft but ive built a heavily insulated room within , ive just been intaking the general loft air , but now summers on its way i no i wont get away with doing this , i was hoping to intake from down by the eaves but theres bricks where they should be? The bricks have 3 holes each in and runs the entire length of the loft on both sides , i can see small amounts of daylight coming through them , is it possible to remove these how can i get round it?