At a glance it looks like MSLPMSLP Mean sea level pressure is the pressure at sea level, or, when measured at a given elevation on land, the station pressure reduced to sea level assuming an isothermal layer at the station temperature. across the UKUK The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and Northern Ireland. in 2023 was more often below average than it was above. There were a couple of notable anticyclonic spells in January and February, and again from mid May into Mid June, but that was about it, with extended cyclonic spells in January, March, July and from mid October to mid November.