The Telegraph says that Vitality will not be renewing its sponsorship of the Blast:
"Vitality, which provides health and life insurance, has been the title sponsor of the men’s Blast since 2018, when it replaced NatWest, and the women’s Blast over the past two summers. It has also sponsored England men’s and women’s home T20 internationals since 2018. It will stop each of those aspects of its sponsorship, although exactly why is unclear."