BRNO had at one time a very nice .375 H&H side x side in the 'vertical format' .. had lovely detachable sidelocks. Handled one at Pragotrade here in Toronto years ago and it was very impressive (as nice mechanically as anything I had seen in London!) .. and reasonably priced. I stupidly passed on it - and it was one of the last in Canada and they (Pragotrade) were closing down their firearms business ... I did take a few ZKK's they wanted to sell off -- one was a hand selected 308W with extraordinary wood, oh well!
(as near as I can tell - the only really well made firearms to come out of the UK are the Accuracy International 'AW' and anything made by RPA)