I'm not familiar with the Miller Howe but their menu is very enticing and when I am next in that neck of the woods I will definitely pay it a visit.
They do need to get someone to proof read their website though as I have found a number of howlers on the menus.
There is a very good Thai restaurant in Bowness it is above a shop but I cannot for the life of me remember the name. A pub with, I think, duck in the name is often mentioned as being a go to place......my cup of disappointment overflowed on my visit :-(