/// So what do you consider "our identity" to be? Britain is a country full of people who are multicultural anyway - those of us not descended from Germanic races are likely to be of Viking stock from invaders and settlers (they weren't welcome either), or Irish, or any number of original races. It's the nature of our country for thousands of years to be multicultural, there is (IMO) no single identity which is peculiarly British. ///
The usual hogwash we have come to expect from those who are perhaps not even old enough to remember how England once was (yes I put England because this is just one more thing we are losing and that is the name of our country).
The Romans the Saxons, the Vikings and the Normans were all part of our history, and I agree all took part in one way or another to make us and our culture what it was until after the 1950s, when an almighty change took place to make this country what it is today a mishmash of different faiths, customs, and cultures, a smaller version of the USA, and that is how we have finished up, a mirror image of what has taken place over more years in the USA.
To those interested this makes interesting reading.
http://www.historyofengland.net/modern-general-history/english-society-and-values-over-the-last-75-years#change_in_society_and_values_over_the_last_75_years