Here is an ensemble from the UK called the Philip Jones Brass Ensemble. It was an ensemble that was founded in 1951 by trumpeter Philip Jones, and was one of the first modern brass ensembles. The ensemble was flexible in either being a 10-piece group for large spaces, or a quintet for more intimate settings.
The ensemble has recorded a large number of albums from its inception through today.
Below is a full concert of the group I found on YouTube. Enjoy!