Last week I talked about the enduring strengths of the Russian armed forces and their ability to launch offensives and apply pressure in Ukraine. Faced with that pressure, Ukraine's ability to carry on the fight will be driven not just by its own determination, but by the flow of weapons and assistance from its allies abroad. Aid to Ukraine has evolved dramatically since February 2022, and there are few topics that have attracted more constant press coverage away from the battlefield itself. So today I try and set out how aid has evolved, who the major contributors are, and the impact aid has had - and may have in 2023.