Any July due dates in the UK?

Louisa • Hi, I'm Louisa, 33, married July 2015, Harry born on 25th June 2016 Baby #2 due 22nd July 2018
I am due July 31st but have no idea at what stages doctors do scans or anything? I have an appointment tomorrow but when does it all kick off. In America I think they test a bit earlier. Can anyone let me know any info that would be great. I'm flying to San Francisco at 7 weeks and wanted to know if they check you before that. 
Thanks xx 

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