Katie Gregson-Macleod, was supposed to perform as the opening act for Tom Odell at the OVO Hydro in Glasgow on Sunday, October 26. The venue canceled Gregson-Macleod's performance as she is currently unwell.On the event page, it stated doors at the arena would open at 18:30, with Gregson-Macleod in support for when Odell headlined. The venue sent a brief update message to ticket-holders saying:"Due to illness, Katie Gregson-Macleod is no longer able to perform."At this stage, no further details have been provided. View this post on Instagram Instagram PostWhat do we know about the Katie Gregson-Macleod show cancellation?The formal announcement from the venue confirms that Katie Gregson-Macleod will not appear at the show in Glasgow because of illness. The statement was brief and gave no additional explanation.Fans who booked tickets for the support slot will still attend the headline show by Tom Odell, but without Katie's performance. The listing still shows her name as support in earlier adverts.It appears the decision came fairly close to the date of the show. The event page still lists her name, meaning this change is all of a sudden. All fans are encouraged to follow the official channels, should anything change. The show itself (Tom Odell performance) is continuing as planned.As the reason given is simply "illness," there is no way to know how serious this illness is, if it prevents her from future dates of the tour or even if she may be able to reschedule the performance in Glasgow. The artist's own comment has not been widely reported.Katie Gregson-Macleod’s work and the impactKatie Gregson-Macleod, a singer-songwriter from Scotland, has gained popularity for her vocal talent and writing skills. To support an act like Tom Odell in a venue like a large arena, such as the OVO Hydro, is certainly an opportunity.In terms of live music, illness is generally an acceptable reason to cancel the performance. Tour schedules are quite intense, and many artists propose to change the schedule due to health reasons. The promoter and venue, in most cases, work to protect the ticket holders and the headline act, if that is the case.For followers of Katie Gregson-Macleod, it will be important to watch her official channels for more updates on this cancellation and its length. More times than not, musicians will put out a short note about the illness, and either propose a new schedule or provide information about whether this will affect other travel plans or venues. As of this current note, a detailed statement beyond what was provided here has not shown up in major public listings.Because the cancellation is at the support stage, the headline show by Tom Odell will proceed, which means the infrastructure, tickets, staffing, and logistics remain largely unchanged.Given this, the cancellation is unfortunate but not unusual in the live music world. Many acts face last-minute changes due to health. The key now will be to monitor official channels for further updates. Tickets remain valid for the main act, and if there are future plans for Katie Gregson-Macleod to appear in Glasgow or the region, she may announce them shortly. The venue has done the essential work of notifying fans and adjusting the schedule.