Hi. Thank you for your prompt and helpful reply.
The question arose because the ‘follow’ button appeared in the bottom right-hand corner of the static front page – all by itself. It was eventually removed by toggling the ‘Follower Settings’ checkbox on and then off. In the meantime a reader had seen it and liked it. It was whilst composing an email explaining that ‘follow’ did not work on static pages that doubt set in!
Thanks again for your help.