Exclusive:

Ministers concerned about pace of vaccines rollout after reduction in supply of Pfizer-BioNtech jabs

Govt source says supply has become 'very constrained' after Pfizer announced shipments delay

Feb 15 target is going to be 'very tight'https://t.co/KcWgMKYxzG

— Steven Swinford (@Steven_Swinford) January 20, 2021