Here are some links to relevant previously asked questions.
http://www.reddit.com/r/AskHistorians/comments/2864j6/how_did_british_civilians_react_to_losing_the/
http://www.reddit.com/r/AskHistorians/comments/1fdh3r/im_a_british_citizen_in_london_during_the/
http://www.reddit.com/r/AskHistorians/comments/1cpsr0/how_is_the_revolutionary_war_viewed_from_the/
http://www.reddit.com/r/AskHistorians/comments/1dkmux/what_were_some_irish_perspectives_on_the/
I would like to add Thomas Paine to the question, given that he was English himself.
Also: how much were people's opinions affected by British propaganda?