Earlier today I took advantage of the Bourgeois postings on this channel to listen to the first symphony. Those involved in the performance can hardly have imagined the composer would go on to break the record for number of symphonies! It is interesting to compare this first symphony with Bourgeois's recent works. Number 1 has an obvious heavy debt to Walton, not found in the later works, but I think there are still detectable common stylistic traits - the quirkiness (like the reference to the Rite of Spring towards the end of the second movement), some characteristics of the orchestration, and a tendency to arrange material in blocks.
His first 6 symphonies can be selected with one click:
https://www.youtube.com/results?search_query=Derek+Bourgeois%3A+Symphony+Nocatalogue of works here:
http://www.derekbourgeois.com/catalogu.htmand much much more here
http://www.scoreexchange.com/search?q=Derek+Bourgeois