"I reckon a bit of morale boosting would actually help with promoting less friction with incoming ethnic groups"
Maybe, I don't think we're much into "morale boosting" as a nation - generally we're against "organized fun" and naturally wary of propaganda. It's a difficult position to hold.
Also, the idea that our imperial pastis "Murky" is fair funny. In the majority of places the British ruled we left a less violent place than when we arrived, and less violent that those of our "competitors" :) - if it was an inevitable thing that was going to happen, those under us had a marginally better deal than others.
Anyone who wants to feel a bit more English could do worse than this:
http://www.amazon.co.uk/Lore-Land-Englands-Legends-Spring-heeled/dp/0141021039
It's good for dipping in and out of. Also fosters a nice feeling of our interconnectedness with the rest of the world.