I would ask the GP rather than go by what you read here.
Not if you’ve only had the routine vaccination course, the MMR is the first one with it, but there is an alternative, yes. https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/1107767/UKHSA-12462-vaccines-porcine-gelatine-English.pdf
There are many vaccines given at one year. The 3in1 MMR vaccine (measles mumps and rubella) is the one that contains pork gelatine. MMRvacpro is the brand of MMR vaccine that contains it. Ask your doctor for for the Priorix brand that does not contain porcine (pork) gelatine. The nasal flu vaccine has it also but that later on when they are offered it x
And no it's not in any of the first ones. X
I can't say if she's had it or not already but you can request an alternative as they do 1 without My girl and my sil are allergic to pork luckily my girl is okay with the gelatine though but sil isn't and there's a few jabs etc she can't have due to that so definitely mention it everytime you go drs for jabs or medicine