
As someone who used to bring food from the US here or have other ship the best method O have found is online shopping. You will spend a fortune sending food over. A small box sent courier can cost you £100. There's a
list here. I don't know where she lives but there are a few stores on the west coast the import British food. Cost Plus Imports is one. There are thousands of Brits in California so a pretty good market over there.