My GP printed mine off there for me, just because I asked as I don't have a printer at home. It's not signed in any way but lists the following:
Who printed it (surgery receptionist's name)
The name of the surgery
My full name
"Patient Summary: LD - Vaccinations"
My DOB, gender, language details
My contact details
My surgery registration details (my usual GP, surgery address, etc)
All my vaccinations to date of printing, starting from earliest to most recent
I think if what you received via email has this info, you should be fine to just print it yourself.