How many illegal immigrants to Britain will actually be deported to Rwanda?

In a desperate attempt to distract attention from the sight of a Prime Minister being fined by the police, the government has announced that illegal immigrants will be intercepted and promptly flown off to Africa. How likely is this to happen?
https://www.theguardian.com/uk-news/2022/feb/24/deportations-from-uk-at-record-low-as-asylum-applications-soar

https://www.bbc.co.uk/news/uk-59243086

illegalimmigrantsBritain