Bit of a long shot but here goes before i buy a new one does anyone have a ideal m30100 pcb board mine has just gone bang! no heating and no hotwater.

If you want to see about getting the existing board repaired, try http://www.cetltd.com/ I've seen him mentioned (and posting) for years on Usenet (uk.d-i-y)

Out of interest, in a previous post there he mentioned that that model mainly fails when the transformer goes and you can often see melted plastic on the transformer casing - is that the case here?

No but it did feel rather warm !

No but my boiler parts place in Bradford has them but the ain't cheep are they

https://www.heatingspares247.com/advanced_search_result.php?search_in_description=1&keywords=M30100&sort=3a&page=2

Fingered crossed you get one sorted.

ATB agriv8