There are provisions which, depending on the compensation, can allow for clawback of benefits paid. For example, if an award is made for loss of earnings, it means the benefit claimant cannot benefit from both that and receipt of benefits at the same time, part of the award at least likely to be retrospective.
Unless anything has changed very recently, it is also not a given that legal costs can be claimed back by the winning party, they can be applied for but it is at the discretion of the Tribunal and it not common.