Some companies are selling home based antibody test kits but the UK health authorities have cautioned against people buying and using these kits (more info here).
You cannot be sure the results you receive are accurate and reliable. So current advice is do not buy home test kits until there are test kits which are validated and certificated by the UK government. Sadly, rapid diagnostic test kits for antibiotic resistant bacterial infections are not available either for home or hospital use. This is an area that also needs focus and investment to improve patient care.
You can read more about test kits here.