Buckler played for the band from its formation in the early 1970s until they broke up in 1982 after five albums and 17 singles - including "a stack of number ones", according the band's website.
I saw them back in the day, a really tight live band, they had to be as a three piece. I think Buckler fell out with Weller and then Foxton, after they split up,
In a Facebook and Instagram post, Weller said: "I'm shocked and saddened by Rick's passing. I'm thinking back to us all rehearsing in my bedroom in Stanley Road, Woking. To all the pubs and clubs we played at as kids, to eventually making a record. What a journey!
"We went far beyond our dreams and what we made stands the test of time.
"My deepest sympathy to all family and friends - P.W x"