After over 11,000km on my front tyre, I was inspecting the tyre and came across this:
Rather than take a chance, I figured after 11,000km the tyre owed me nothing. So I replaced the tyre - a Veloflex Corsa Evo TLR 25mm - with a new Veloflex Corsa Evo TLR only in 28mm this time.
So now I am running a mismatched set of tyres on my BH. A Schwalbe Pro One in 25mm on the rear, and the Corsa on the front. For now my OCD is held in check and I'm not changing to have matching tyres. I will likely ride out the season with this set of tyres, pending any issues.