Thanks for such a prompt and helpful reply. We do have saved text messages on our mobile phones and so I guess actually taking the phones to the interview would help (obtaining a printout of text messages could be time consuming and costly ?). I will also remember to print any e mails exchanged between us. I can understand the arguments in favour of either a fiance visa with marriage in the UK, or a spouse visa after marriage in the Philippines; clearly a joint decision !
I'm a relative newbie to this forum, but I'm very grateful for the advice and for my part have already offered advice in return on serious matters ( nursing in the UK, forecasting the weather) and less serious (how to stay feeling young ....sorry, even after 35 years as a doctor I don't have all the answers to that one!).