Pre Settlement Visa, Evidence of Residence

I have applied for pre settlement visa on 29th September. I got an email from home office today to send a proof of residence i-e One piece of evidence dated within the six months before your application.

I have a letter from my surgery confirming my registration. Letters from surgery aren't mentioned in this list https://www.gov.uk/guidance/eu-settleme ... ds-of-time

I have two question

1. Is it the valid evidence of residence?
2. I receive this letter on 29th and I have applied on 29th, it will be valid to cover ( within the six months before your application).

Thanks.