The Crisp MO discussion got me thinking about Maris Otter and how we as homebrewers focus on it. I have used a bag of Pearl and it was fine. There are other malt varieties grown in England, and I have read before that there is not that much Maris Otter grown, and it is a niche product for UK craft brewers. So the attached link has the varieties grown in the UK in a graph, and Maris Otter is a small but fairly constant sliver of production.