Best flavoured thornless blackberry?

Can anyone recommend me a well-flavoured thornless blackberry variety?

The one I've got here at the moment is 'Oregon Thornless', but it's never done that well and the flavour of the fruits is distinctly underwhelming, compared to the wild ones. I'd like to replace it and am overwhelmed by all the varieties on offer! Black fruits, white fruits, yellow fruits, giant fruits ... but will any of them actually taste any better?

I thought another thornless one would work best, as those are apparently less rampant in growth and the space is a bit limited - sunny position, 6' wall + trellis, like the last one but in a different position. I would however happily put up with some thorns if you tell me the superior taste will make any pain worthwhile

Many thanks!

 

Just had a look at Chris Bower's thoughts on the subject of taste, and he admits that none of the thornless varieties has the same taste as thorny ones. That's been my experience of LochNess, too.
Blackberry Canes For Sale | Thornless Blackberries Plan - Chris Bowers

 

The best thornless blackberry?
The ones in my garden - no kidding, we moved around a lot and every time (6x) we took the time to dig it up and replant it at the new location.

Sadly i dont know what kind it is

 

Thank you all very much! I love the thought of @Black Dog's mysterious travelling plant, and @JWK made Chester sound tempting - I gather that also has pretty pink flowers, which must be a bonus. However I ended up ordering a bare-root 'Merton Thornless'; that's meant to stay relatively compact, so should work in my small garden. It's also Chris Bowers' favourite amongst the thornless varieties, @noisette47 - he says it "It’s an oldie but the flavour ranks amongst the finest of all and it remains a good yielder."

ETA I checked the history and it was bred a few miles down the road in the 1930s, at the John Innes Institute at Merton Park. So should hopefully feel quite at home here!