It will be the first-ever shows performed by Mott without Griffin, whose Alzheimer's disease was already a problem when he appeared for part of the set during their 2009 reunion shows.

And Allen admits it was a shock seeing his old bandmate for the first time in 39 years. He tells Wales Online: "I remember him not really recognising me at first, and thinking to myself, 'Has time really been that harsh? Have I really changed that much?'"

Griffin was able to perform the band's songs "flawlessly" � but Allen says: "He'd go from laying down these note-perfect renditions to not knowing where he was. Then I noticed he was struggling to assemble his drumkit each time, as though he was seeing it for the first time in his life.