Obviously once I post it, I am in the hands of the Royal Mail and your national carrier, so I cannot guarantee delivery times. Royal Mail gives a shipping time of 5 to 7 working (not calendar) days, but my experience is that this is very optimistic. Please don't rely on that shipping time if it's a gift and time is short.

The Royal Mail gives a shipping time of 3 to 5 working days, and my experience is that this is met most of the time. I can't guarantee it, however; like you, I am in the hands of others once it's posted.

In the UK, generally yes; next day delivery does what it says on the tin. For the rest of the world, no. The parcel takes exactly the same route whichever option you choose. The only advantage to the tracked options is that you can go on the Royal Mail website, type in the number I provide you with and it will tell you where in the world it has reached.

Yes, you can. Provided the print is a suitable size, I will mount it at the size you request. There is no increased shipping charge if the size is larger. If you wish the print unmounted, please don't underestimate the cost of getting it mounted yourself; it can be quite expensive.

Yes, I do. The one very slight amendment is if one of those days is a public holiday in the UK (when the Post Offices are not open) and you are unaware because it is not a public holiday in your country. However, I will always let you know if that is the case and such circumstances are rare. I would add that I turn around about 80-90% of orders within one day; often just a few hours.

Yes, you can, and I will send it directly to that person and forward the receipt to you electronically. However, please be aware that, for packages outside Europe, I have to affix a customs declaration to the outside of the package which has some shipping details on it, including the value.

The honest answer is possibly. Obviously I can't find an advert that was never produced in the first place; but I have thousands of adverts, of which only around 200 are on Etsy, so it's possible I have something closer to what you want. Send me a convo, and I'll search my archive! If there's something you like, we can set up a custom order, so you retain all the Etsy convenience and protection.
Please be aware that many adverts are extremely rare (and getting rarer) and in the majority of cases I only have one copy, with limited chances of finding another.