Strange "problem". Oversized veg

I don't know if anyone else has this problem. It's maybe a combination of the good summer, good well-manured soil and plenty of Growmore but all my various types of beetroot are growing to almost football size. This particularly applies to the Chiogga and various white and yellow ones including Alba.

To some people this may sound like good news but we are frankly over-faced by them and I miss the old days when they rarely grew beyond tennis-ball size meaning that it was one beet per meal

I just sowed/planted the same amount as in the past. They used to bolt and go woody long before they reached this size

Yes my chioggia are bigger than ever before, and I'm usually standing over them waiting for them to reach golfball size 

The biggest one made lush beetroot crisps

Mine are large too and I'm inundated! I didn't have enough last year so sowed a few more...