Hi Janni,
It is difficult to say without more information and it could not be determined in this forum. You would need to consider what the legislation allows HMRC to charge to tax and in turn consider if it falls under any of the categories. For example for it to be chargeable to income tax there would need to be either a connection to a trade profession or vocation ie the badges of trade or as a benefit from an employment. It is possible it is an intangible asset for CG, so you could refer to
CG12010 - Chargeable assets: intangible assets: rights.
We can only provide general information in this forum and we don't know enough about it from this to say. All we can do is point you in the direction of the guidance to, make an informed decision. For an answer to a detailed question of this nature, you would need to contact our self assesment helpline on 0300 200 3310 or seek professional advice.
Thank you.