There is important information for UK recipients on COVID 19 Vaccine AstraZeneca on gov.uk
www.gov.uk/government/publications/regulatory-approval-of-covid-19-vaccine-astrazeneca/information-for-uk-recipients-on-covid-19-vaccine-astrazeneca
Details shown here about possible side effects include -
Very Common (may affect more than 1 in 10 people)
tenderness, pain, warmth, redness, itching, swelling or bruising where the injection is given
generally feeling unwell
feeling tired (fatigue)
chills or feeling feverish
headache
feeling sick (nausea)
joint pain or muscle ache
Common (may affect up to 1 in 10 people)
a lump at the injection site
fever
being sick (vomiting)
flu-like symptoms, such as high temperature, sore throat, runny nose, cough and chills
Uncommon (may affect up to 1 in 100 people)
feeling dizzy
decreased appetite
abdominal pain
enlarged lymph nodes
excessive sweating, itchy skin or rash
In clinical trials there were very rare reports of events associated with inflammation of the nervous system, which may cause numbness, pins and needles, and/or loss of feeling. However, it is not confirmed whether these events were due to the vaccine.
If you notice any side effects not mentioned in this leaflet, please inform your doctor, pharmacist or nurse.
If you get any side effects, talk to your doctor, pharmacist or nurse. This includes any possible side effects not listed in this leaflet.
If you are concerned about a side-effect it can be reported directly via the Coronavirus Yellow Card reporting site or search for MHRA Yellow Card in the Google Play or Apple App Store and include the vaccine brand and batch/Lot number if available.
By reporting side effects you can help provide more information on the safety of this vaccine.
Sorry that this information has come out a bit messy as I've just cut and pasted from the link. It's worth reading the whole thing. There is a link within this link to the yellow card system for reporting side effects. Also has information on reasons why the vaccine might not be suitable for all or vaccination should be delayed.