Marks on sugar tongs

I realise the makers’ mark will be a challenge, however, help with the others would help please.
Thanks in advance
John
hm.jpg
IMG_4282.JPG

Shot in the dark - could it be a Sheffield commemorative mark?

No, John, it’s a standard form of the Sheffield mark for small items. The combined crown and date letter were used from 1784 to 1853. This is 1818.

My best guess at the maker is Smith, Tate, Nicholson & Holt (registered Nov 1 1810):

Phil

Many thanks Phil.