>>> "Roses do not like being moved in the spring"
Things must be different on the other side of the pond then. This American rose-growing company says "The best time to transplant a rose is in early spring when the rose is still dormant. This causes less stress and shock to the plant":
https://www.heirloomroses.com/info/care/how-to/transplanting-roses/
(There's lots of useful advice there, Tearinghair).
Given that last month was (according to the Met Office) the frostiest April for 60 years, this month might possibly still be considered 'early spring' in horticultural terms, I think.