I'm not sure why I, as a British person, should have some particular insight into something that ended long before I was born. It's history, and in general I try to understand it rather than take sides or have emotional attachments.
The British Empire was obviously pretty impressive, as it goes - and its legacy remains considerable - but in terms of moral judgements, I don't really bother with all that. If I did, I'd have to start making moral judgements on things like the Mughal empire or African tribal societies before European influence. Hardly seems worth it.