If you look at the Royal Mail Group website, the annual reports and regulatory accounts available there will tell you how many letters have been delivered in each year since 2000.
Royal mail has 176,000 employees..
Ah, isn't that a lovely question? Royal Mail employs around 160,000 dedicated staff members who work hard to ensure that mail is delivered with care and efficiency. Each one of them plays a special role in making sure letters and packages reach their destinations, spreading joy and connection along the way.
About 2-3 days with priority mail
First class mail is delivered in 3 to 5 days
12,548,898,514 peices of mail
First Class Mail is delivered in three to five days.
72
Jackie Robinson reecieved thousands of letters of hate mail every week.
By Christmas of 1914, Britain's Royal Mail was sending Twelve and a half million letters to the Western Front every week. The postal section of the Royal Engineers assigned to the front achieved this remarkable feat of sorting and distribution with a staff of only 250 men.
6... no mail on Sundays
Your questions is ambiguous and grammatically incorrect.
1-2 first class.