See the actual surface weather charts from UK Met-Office overlaid with various products derived from MSG channels.The products are updated 4 times per day, i.e. 0000, 0600, 1200 and 1800UTC. Note that the natural color RGB and the true color RGB are updated only 3 times per day i.e. 0600, 1200 and 1800UTC.
The airmass surface weather chart is updated 4 times per day i.e. 0000, 0600, 1200 and 1800UTC. It is achieved by using data from channels in the visible or near the visible spectrum.