@penelopepinkbott
You have had a nursery and a private childminder telling you your son at 2.5 shows clear signs of autism.
They are professionals dealing with children on a daily basis with a wealth of experience.
The best chance you have of your son having a normal life is to have early assessment and intervention.
You need to get reports from the nursery and and childminder immediately, have your Gp or health visitor refer him to nhs assessment…. Then find a private provider (if you can afford it), that follows NICE guidelines that the NHS will accept a report from for ratification - phone a local autism charity in your area for advice on private providers and management.
If you do the above you can have your child assessed within the next year, and following nhs ratification he will be on the wait list for intervention….
All of this is important because it sounds like your son could need 1:1 or an alternate setting, both of which are hard to come by and you need an evidence bank.
Ideally, you want him going into school with an EHCP so that his needs are met and he is able to meet his potential.
With early identification you have a massive opportunity to support him to be the best he can be…. Or due to your stubbornness he can go into school unsupported and end up in a right mess.
Regards the childminder - yes she can terminate the contract if he is endangering the other children. You may need to make yourself, husband or family member available or hire a child minder for him alone. You can apply for DLA once he is 3, diagnosis or not, to help cover the extra costs. Citizens advice and online guides can help.
Genuinely my son was like yours at the same age but it wasn’t picked up until he was 3.5. You have a huge opportunity to do good for him here. Bluey is his special interest hence why he pays attention.
Read up on the signs of autism and aspergers syndrome (now under the autism umbrella). Please take the advice from people who are professionally trained and all the mothers on here urging you to get your son help - you would if he had a physical health need.