Add phone number into navigation bar

Hi , 

I would like to add a phone number into my top navigation bar, ideally to the left of the CTA button "Get in Touch"

It would be great to have a small image of a phone before the number as well

I've seen a few ways to do this , but need some input from the experts on how to achieve this 

Site URL: https://orb-robin-wn9f.squarespace.com/

Thanks

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