You're wrong. The Brexit Party have not produced a 'manifesto' as they are not worth the paper they are printed on. The Brexit Party have produced a 'contract', and it is excellent.
You can read it, or download it, here:
You can only enter into a contract if you have the means to fulfil your part. easy to do if you have np chance of so doing
At least a manifesto is a statement of intent, if you have no intent then no manifesto
But this is typical of snake oil salesmen like Farage