There isn't one. Some provide blow by blow stories of their encounters with SPs. Others keep to the bare minimum facts like "I turned up she existed and looked like her photos. We had sex and it cost £x for y minutes."
The core pieces of information people need are:
1. Link to profile so people can find them
2. How SP compared to profile photos
3. Fee paid, for how long and what services
4. Description of encounter - as long or as short as you like. Try to keep to the facts.
5. Rating: Positive/Negative or Neutral
6. Would you go back
You do NOT need to give exact date or time.
Try not to use offensive or derogatory descriptions of the SPs like she was fat or ugly (beauty is in the eye of the beholder). They're human beings just like you and I. They have feelings. Remember the SP may be reading the review and comments can be hurtful and being an SP can be a lonely and mentally and physically demanding job. We all have our challenges in life and ups and downs and good and bad days in our lives. Try not to add to someone's challenges by being nasty. You can say you didn't enjoy it without being nasty. Nasty comments is one of the reasons SPs don't like this site. It's in all our interests to be respectful to SPs just we like SPs to be respectful to us. Remember a particular SP may not be right for you, but they may be ideal for another SP.
Don't give street, hotel or apartment complex names - general area is good enough.
Avoid giving too much information that may identify you to the SP unless you want the SP to know it is you e.g. non-standard positions you had sex in - this may or may not affect your ability to book the SP in the future as SPs are on here and some do NOT like UKP members. If they find out you are one then you may get blocked.
Do NOT share personal details that SP may share with you in private conversations like if they're married, have kids, where they're from, their opinions on their place of work or other SPs - which may affect their ability to work there, what their inside leg measurement is, do they like their coffee with milk, perhaps identifying tattoos or marks, etc. Sharing this information can cause SPs problems. Discretion is important both ways, so respect the SP's privacy just as you would expect them to respect yours.
See
External Link/Members Only for additional info.