Looking on the internet deeply has found these results:

it has been an honour is the most popular phrase on the web.

it's been an honour 15,590 results on the web	it has been an honour 1386,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
"It's been an honour and a privilege working with you for/over the past few years." ) And yes, Odysseus54, I also agree about 'has been' and�... Feb 3, 2015 ... Really going to miss this guy. RT @Baird It's been an honour to serve as Canada's foreign minister. Thank you all @CanadaFP. 1 retweet 3�... Thank you it's been an honour and privilege. Anas Sarwar MP, Interim Leader of the Scottish Labour Party in an email to party members said: Last night, I�... It's been an honour, a privilege and a pleasure. Tags: Blog. Published by: Joe Lenane \| Published Date: 6th June 2013. Outgoing National President Alan Smith�...	It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

it's been an honour

15,590 results on the web

it has been an honour

1386,000 results on the web

More popular!

"It's been an honour and a privilege working with you for/over the past few years." ) And yes, Odysseus54, I also agree about 'has been' and�...
Feb 3, 2015 ... Really going to miss this guy. RT @Baird It's been an honour to serve as Canada's foreign minister. Thank you all @CanadaFP. 1 retweet 3�...
Thank you
it's been an honour and privilege. Anas Sarwar MP, Interim Leader of the Scottish Labour Party in an email to party members said: Last night, I�...
It's been an honour, a privilege and a pleasure. Tags: Blog. Published by: Joe Lenane | Published Date: 6th June 2013. Outgoing National President Alan Smith�...

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.