grammar skills in the UK

Out of curiosity, do professional British people adhere to any grammar rules?

This is the response I received from UKVisaImmigration:
"Further to our recent e-mail confirming the receipt of the application above we have not been able to locate an Appendix 2 with the documents provided."

Is it me, or is the sentence missing a comma? 

The sentence is missing a comma, yes, but are you really extrapolating from one missing punctuation mark in one e-mail that professional people in the UK don't follow grammar rules? Your question strikes me as bizarre. The answer is yes of course they do, but that errors are sometimes made and some people are more diligent about such things than others. Just like everywhere else in the world.