Twitter Blue subscription service listing appears online

The subscription service has been much rumoured over recent months (Andrew Matthews/PA)

Twitter has listed a new subscription service in online app stores, suggesting the social network may soon begin trialling the new feature.

Twitter Blue now appears as a possible in-app purchase when viewing the Twitter app in app stores, with the service listed at £2.49, (€2.90) but it does not yet appear to be accessible inside the Twitter app.