The frequency for Cardiff approach is incorrect. A Notam has changed it to 119.155.

Changes to frequencies are only permanent when they become part of the AIP, at which point SkyDemon's chart data is updated too. As pilot-byom says, in the meantime you've got the NOTAM notifying you of the change and this is how it's supposed to work. We don't pre-empt the change in our permanent data based on the NOTAM, because it could theoretically be cancelled at any time.