The Evening Standard (https://www.standard.co.uk/news/uk/rwanda-asylum-deal-uk-asy...) quotes 200 people from the Rwandan Government, "but that it could be scaled up".

A research briefing document from the House Of Common Library (https://researchbriefings.files.parliament.uk/documents/CBP-...) states that the Memorandum of Understanding on which the scheme relies states no upper limit on the amount of people that can be sent to Rwanda.