Already mentioned but there are lots of resources and links on the National autistic society website- https://www.autism.org.uk . They have training packs for autism awareness to use with peers.
Also for parents:
e.g. https://www.autism.org.uk/advice-and-guidance/topics/diagnosis/post-diagnosis-support/parents-and-carers
There are links to training and guidance at : https://www.autismeducationtrust.org.uk/