As well as the sarpos, which don't taste good and tend to grow huge and split inside, other varieties such as Cara and Lady Balfour are blight resistant.
None of the blight resistant varieties are fool proof because new strains of blight are always emerging, and these varieties may be susceptible to them.
Nor is growing them in pots or under cover foolproof - blight spores will be blown in on the breeze.
Earlies are less likely to be attacked by blight before you get a crop than maincrops.
Last year was not a blight year for us, so probably this year will be doubly bad