When you look at the UK history and the Commenwealth this is a part of our history where we should feel ashamed about our past
I disagree. The people who feel guilty tend to be middle class English people who get hung up on political correctness. I remember listening to a Radio 4 series (how middle class is that!?) in which the commonwealth and legacy of empire was discussed by people from all parts of the world concerned. Those who looked at the empire most positively tended to be Indians and even Africans. They accepted that there was unfairness, brutality and so on, but that where it now leaves them is with good connections with the English-speaking world, of which most of these countries can be considered a part.
One Indian commentator drew parallels with previous invaders of the Indian subcontinent, such as the Mongols. After some time, the Indians are left with the things that they want and appreciate about their former invaders or oppressors, yet still remain undeniably and unchangeably Indian.
In the UK, in the news and in current affairs, the word "commonwealth" is actually quite a turn-off when compared to talking about America or Europe.
That is the opposite of the European view of Russia and its empires (including the USSR). Former "members" still wish they could see the back of the whole thing just a little more than they already can (see discussions about Russia's power over Europe today). The time comes with any such turn of history, to move on and get on with paving a future with what is available rather than living life dwelling on what could have been, if only...