I have a client I have never seen before, we have booked an appointment for this Friday, I asked him to confirm on the morning of the appointment, before 10am. Today (Mon) he sent a message confirming and also letting me know he has just had the all clear from his recent sexual health screening. This is huge alarm bells for me, as I get these messages from guys all the time, swiftly followed by BB requests which they know I don't offer. Also, the last time we tired to make a booking I said I wasn't available as he got my name (completely) wrong, in a text the next morning confirming that he could do one of the dates we had discussed on the phone. He doesn't sounds like the sweet, nervous type who might just be telling me to make me feel more confident (I am not new) I just can't see why he would tell me that unless he will try and pull some bullshit BB pushing routine when he gets here, or genital to genital contact. I just wanted to ask has anyone done this to you before?

Glaringly obvious?  I would say, it is.

I would reply and say something along the lines of, thank you for informing me of your sexual health status, but there was really no need as I only provide protected services.

He's just trying to be a clever dick with a view to pushing bb in my opinion.

100% agree

No need to tell you this unless looking BB or he is wanting you to reply that you have had a test recently and it is clear.

"I am clean" is usually followed by so we can do BB.

Aside from anything else his latest sti results are meaningless as he could have picked up something just after his results.
I'd ask him why he has sent them to you.I'll bet his response will be that he is hoping for an unprotected service.