Since all webcams (unless stated) are not hosted by us, it really depends on the maintenance or upkeep of the host's server. In most cases, the host takes webcams offline, which we have no control over, so we will remove them from the list.
If a webcam returns online, we will try our best to try to bring them back into the app, however, there is no guarantee.
If you notice a webcam has come back online or seen a new webcam you'd like added, contact support@ashleyrichards.co.uk with a link to the website and if relevant we will try to add it to the app.