Hi Steve.
There are over 2000 varieties of spuds out there!!!
Go for a floury spud rather than a waxy one. Watery/waxy potatoes soon fall apart in the boil. Avoid Nadine & Maris Piper and go more for Mozart, Romano types. King Edwards have a high dry matter content and are probably good too but I dont know for sure because we dont grow them. Some varieties like Rooster have a v high dry matter content so probably stand up well after the boil, but might be too dry for most tastes, but again I dont know for sure. Her Indoors does stews and cassaroles using romano and even after 3 hours on a low heat they still havent started to disintegrate. Estima is a very popular variety. They are fairly dry too so probably stand up well too.
Seasonal factors affect the dry matter content, so there is quite a bit of regional variation too depending on the amount of irrigation etc.
Hope this sort of helps
