There needs to be a renewal across the world in how our nations are lead. Almost every nation is based on old rules that were based on their times, and the world has changed so much in so little time. The United Kingdom is not alone, and needs to change how they operate to give more to the global cause.
Times are changing in every country of the world as people are becoming more vocal on social change and equality. UK should reform its constitution because the document needs to reflect the value and beliefs of the masses and not just the few who had a say in its original inception.
There should not be a radical constitutional reform in the UK. This is because no matter how we execute a new constitution it will still not be a modern one. We need to do something better than just a rewritten constitution to pull them into the 21st century and improve.
I believe the government of the United Kingdom functions really well given all of the changes they have made over the years and the length of time the government has held power. I think they are best to make incremental changes rather than making radical constitutional reforms. Change can be difficult, it's best to break it into smaller pieces.
There should not be a radical constitutional reform in the UK. Radical reform greatly changes things and often times has unintentional consequences. These consequences are not known until after the fact and are often times too late. This type of radical reform can crumble a national that is sitting comfortably as it is.