Thank you for your reply.
I have been here unfortunately. I checked the car on a few occasions from the back as I walked past the street and did not notice any suspensions or the tickets. I walked round the front of the car yesterday and saw the tickets. Lesson learnt that I need to walk up to my car every other day to check my car for suspensions - it is difficult to do so when you are parking well away from your flat and not walking past your car each day.
Is there any defence to the multiple tickets? I would expect a parking enforcement officer to try and clear the bay by contacting me as opposed to visiting at 7am every morning to put a fresh ticket on (clearly the bay wasn't needed to be suspended). Is there a one per day limit as 7am is not even within parking hours?