With the spring 2019 schedule release today, I've noticed that some UK-GVA winter seasonal routes aren't loaded to continue into April like they did this year and previously. The routes I've seen that this applies to appear to be SOU, BOH, ABZ and GLA to GVA. All are currently only bookable until the end of March. I haven't looked for others but can see that airports with year-round GVA services have theirs continue.Could this be due to the current Brexit uncertainty, or is there another schedule update due at a later date?