Finally got in. I watched a very helpful youtube video
I renamed my plugin folder in my ftp client which deactivated them and I was able to login as normal. I then renamed the plugin folder to its original name. WordPress was able to tell me which plugin had caused the problem. So I was able to reactivate the rest and keep that one deactivated. And I still have my hair! Result!
Did it! Looks pretty much OK to me. Many, many thanks for your help xx
Thanks for trying. Where would I put the code you gave me?
Thank you!! That is perfect!
