All I want for Christmas

This is a view over the allotment next to ours. In the background is Abbot's Barton Farm which much to most people's dismay is going to be developed into a huge area of housing, school etc. It is a magical view where the sun sets and we can watch the seasons change.
Just here in the foreground is the most delicious thornless blackberry - the fruits are long, large and really delicious and I must try to find out what variety it is . So, that is what I covet - I wonder if I can ask for a cutting for Christmas?