I heard a Rotherham man being interviewed on Radio 4 earlier today about the effects of the recession. I thought I heard him say 'It semt to come on suddenly' ('semt' where 'seemed' would be expected). If I heard that correctly (I wasn't listening carefully at the time), it would be presumably be analogical to /dremt/ - /dri:md/. Have you ever heard this? Or did I mis-hear?
I’ve never heard it, but it seems entirely plausible. The OED has a past tense semde, sempt, semt in the 13th-16th centuries.
You could possibly check in the Leeds Survey of English Dialects.
Peter then reported
I consulted my cousin-in-law, who knows the area well - he used to be Head Teacher of Grimethorpe Comprehensive. I remember him telling me of hearing one of his teachers saying to a boy “don't tha thee-thou me!”. His reply concerning semt:And I in turn can say that I have heard tret for the past of treat.Yes semt (I'm not sure exactly how it's spelt - it can be pronounced more like sempt) is common in Rotherham, Sheffield and Barnsley, tha’ knows. They also use tret (for treated).
So I think I must have heard this form correctly.