From John Biggs:
“Blockley Tyres has now released their 28 x 3 Tyres - I am going to fit them to my cars as they have a great reputation for their Model T tires, according to the MTFCA Forum.”
John included this Blockley link:
https://www.blockleytyre.com/product/28x3
My 2 cents; I have Blockleys on one of my cars and they appear to be a well made quality tire. The inner tubes are the best I have ever used.