Hey everyone thanks for all the help.
It took me 4 hours to clean inside and out this morning as the last owners did not keep it tidy! After removing the side strips fairly quickly it then took me another 4 hours to get it down to this. I had to ask my sister and her boyfriend to help me out and even with three of us trying to remove the adhesive it is still very time consuming. We tried brake cleaner, tar remover and even nail polish remover but none of them seem to help much. In the end we used brake cleaner and old gift card vouchers to scrape it off without scratching the surface which seems to be the best method.
Now I've dropped out of sixth form I've got all next week free to finish removing it which should be enough time 😂