Have namechanged as we don't want anyone to know we're received this money. My DH works in the public sector. His hours and shift allowance are being cut (12% shift allowance) so obviously his wages are going to be reduced by quite a bit. He's in a union, the union fought his employers and won the employees compensation.
The compensation they are going to be paid is £2500, on the condition that the employee doesn't leave in the next 2 years otherwise they will have to pay the money back. DH is receiving this compensation in his next monthly wages. He normally earns around £1054 a month after tax and NI have been paid. So he usually pays around £200 ish a month in both tax and NI. Because he received the compensation in his wages they have taxed it and he's paid NI on it. So he's £650 in income tax this month (when he normally pays around £135 a month tax) and £350 in NI this month (when he normally pays around £70 a month in NI). Is this right? Is the compensation classed as taxable income? He's basically lost around £900 of his compensation to tax and NI. 
Also he has an AEO on his wages due to unpaid council tax from when he was younger (I know, I know). This is a percentage of his wages so normally around £200 is taken from his monthly wages, this month because the compensation is in with his wages they took £850! 
Is this right also? I'm guessing it is? And there's probably nothing we can do about it?
So out of this £2500 compensation he's received we've ended up receiving roughly about £900.
Is there anything we can do to get it back? Or is right that he was taxed and NI that much and the percentage of AEO that was taken is right too?