Support British artist's choice of breakfast sarnie filling (4,5)

I believe the answer is:

back bacon

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'choice of breakfast sarnie filling' is the definition.
I don't know anything about this answer so I cannot judge whether this works.

'support british artist's' is the wordplay.
'support' becomes 'back' (to back is to support or endorse).
'british artist' becomes 'bacon' (painter Francis Bacon. I am not sure about the 'british' bit.).
'back'+'bacon'='BACK BACON'

Can you help me to learn more?

I've seen this clue in The Telegraph.

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