Hi OliUK
I really appreciate that you are spending so much time helping strangers!
I recently installed the Flex theme from Out of the sandbox and im getting a speed of 17 on my page www.mamamilla.dk
Could you, when you have the time, try and see if there are any low hanging fruits for me to pick up the speed. Im seeing loads of URLs(almost all) with LCP/CLS issues in Google Search console, and I have no clue how to fix it.
Thanks in advance 
Bruno