Thanks for your replies, Yes he was paying 41% previously and now is in the 20%. He did earn more than his standard weekly cut off and now with salary reduction is earning just below his standard weekly cut off.
hopefully he will be due back as it would help immensely, the salary reduction happened 2 weeks ago so hopefully there will be some repayment through payroll. All tax credits are being claimed and he also has my tax allowance/credits.
Thanks.