I wanted to follow up on this briefly,
I contacted Sanofi about this exact issue in 2018 and after being asked to supply the name of the product I never heard back (I still have both e-mails). Checking their website
here gives you an option to find the info about the product you are using, and a link to a PDF of the leaflet. In one leaflet I found it had been updated and the number they give is: 0800 035 2525.
Do let us know how you get on.
EDIT: The alternative number for Sanofi UK has been removed.