For first earlies 'Sharpes Express' get my vote,second earlies 'Charlotte' and 'Kestrel'.
The Kestrel can be left a full 20 weeks or until the haulm dies back,they will then produce some quite large spuds, two last year weighed in at 4lbs each, which are good for baking leaving a lovely crisp skin.
New this season are first early 'Casablanca', nice tasting waxy salad spud, and 'Juliette' , said to be an early main but can be used as a second early, yet to be tried.
Then to finish off it's ' King Edward' usually enough to keep the two of us plus occasional visits from the family from September to January.