The answer is at least six. I was in a queue at the post office this morning and I counted them.
They have titles like Carp Fishing Monthly and Total Carp and all have covers showing a grinning man holding an enormous fish. Perhaps it's the same fish. Perhaps they pass it around.
Name an interest or hobby- and it'll have a glassy magazine devoted to it. If its a popular thing- like genealogy or rock music or even tattoos- there'll be a whole raft of different magazines.
Who buys them all? How do magazines manage to flourish in an era when newspapers are closing? How many carp fishermen are there in Paddock Wood?