I would guess you're taking the constituency name and doing something like this: https://members-api.parliament.uk/api/Location/Constituency/Search?searchText=

I would guess you're taking the constituency name and doing something like this: https://members-api.parliament.uk/api/Location/Constituency/Search?searchText=Stafford&skip=0&take=20 https://members-api.parliament.uk/api/Location/Constituency/... returns three constituencies, all of which look fine to me, but the "Stafford" one is the middle, and you're using the data from the first returned constituency