Motorcycle insurance for a new rider has doubled

Hello,

I am just in the process of going for my Direct Access licence ( I am
30+ ).

When I started out on my journey, like all big kids I dreamt ab out
the bike I will eventually own (probable a Honda CB500S), assuming I
had a full UK licence but with no experience.

This insurance came in around £180 (This was in June), now I am
getting insurance quotes for the same bike using the same criteria of
around £340.

Is there any reason why this should have heppened


Thanks in advance for any info on this

.