When did mileage redemption rates increase?

Apologies if this has been covered previously - but when did Virgin increase the mileage needed for an Upper Class LHR to CPT ticket. It used to be 50 000 miles - it now is 60 000 ?

Thanks

I think some of the redemption amounts changed in February

It was part of a general re-jig of redemption rates. Some went up and some went down so there were some winners and loosers (just like when BS re-jigged avios rates)