I am interested to know how this Ash has become badly cracked up one side of it's trunk?
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sometimes fungi will push through the bark causing it to crack but I have never seen it all the way up the tree like that. I have some examples of this fungi on my website www.fungifest.vpweb.com if you want to have a look.
It's amazing just how resistant trees are to lightning strikes. However, the water/sap inside them instantly vapourises - which can cause them to split the entire length of the trunk similar to what can be seen in your images.
The localised intense heating causes a steam explosion, splitting the bark.
Lat/Lng: 52.6, 1.3
OS grid ref: TG2308