Can crescent be abbreviated to cres on letters royal mail

According to the Royal Mail's guidelines, "Crescent" can indeed be abbreviated to "Cres" on postal addresses.

Here's a quote from the Royal Mail's website:

"Abbreviations: Use the following abbreviations for common street names:

So, if you're sending a letter to an address with "Crescent" in the street name, you can safely use "Cres" as the abbreviation.

Remember to always check the Royal Mail's guidelines for any specific address formatting requirements, as they may vary depending on the location and type of mail being sent.