In the wider context. 3 national series have failed due to lack of numbers, and there has been general doom and gloom in comments sections after each of those.
First the is the didn’t fail because a lack of riders. They failed because the riders choose other events over theirs.
Blog is not bad. Graphs are ok but to many, what about just some numbers instead. Here are so more interesting stuff from R&R:
Distinct competitors at UK enduro events:
2011 699
2012 1716
2013 2985
2014 4890
2015 6384
2016 8325
2017 9425
2018 7754 (to date)
And for DH:
2011 4199
2012 4889
2013 4272
2014 4205
2015 4912
2016 4647
2017 5105
2018 3646 (to date)
Total competitors(Which is one of your graphs):
Enduro:
2011 1160
2012 2771
2013 5355
2014 10037
2015 13536
2016 17635
2017 18508
2018 13212 (to date)
DH:
2011 13495
2012 14768
2013 13391
2014 13001
2015 14050
2016 13358
2017 13649
2018 7911 (to date)