No there is nowhere to check online for entries.
I am a BRCA Official ya know, so I asked, as I am trying to promote our section
There are alot of people that usualy race nationals that haven't put their entry in, many F-1 drivers often leave it late, but remember to put a SAE in for confirmation they have received your entry, there has been a few people caught out in the past with lost post or even forgetting to enter, I won't name names haha
I expect this year to be the most attended National Series ever, so remember preference goes to drivers entering 66% or 4 or more.