Had my ride this morning. A lot harder than I expected - the gym bike I'm used to has made me soft.
Once I started I could tell 15km was a pipe dream, so I mentally reset to a new target of 25kph = 12.5km.
So close - 12.43km - but no cigar, luckily I don't smoke cigars so no loss.
Thanks for your sponsorship, now I am in recovery. Ironically that will include much sitting!