One off Capital Gain for Trust

Hi, If a trust has its income mandated to the beneficiary but then has a one off gain that needs reported, is there a way to report the gain without having to register for self-assessment? Would you be able to use real time reporting to report one off gains for trusts or is there another way of reporting the gain that doesnt involve submitting a tax return? Thanks,

Hi,

You can see guidance here:

Report and pay your Capital Gains Tax

Thank you.