Can you recommend good editing/proof-reading service, please?

It is better to find an editing service specialised in your research area. Some editors may not understand the paper and may change the meaning of some of your sentences. So it is better to find a professional scientific editor in your area. I know it is an old post so this message is mainly for those who are looking for editing services. Not sure what is your field? If is biology/medical ones maybe you can try Zenith Biomedical Editing.... cheap and good quality. They have free sample editing too...

These are brilliant (I used to work for them and the feedback we got was excellent), and they cover all areas of science:

Looking for the Academic Writing & Scientific Editing & Proofreading Services?
I recommend Phd Assistance for the Subject-specialist proofreading and editing services for better results.

I recommend

It is always better to find experts in your fields to edit and proof-read. I would recommend following services. They have wide range of services, with experts in different fields.
https://www.enago.com/
https://www.enago.com/editing-services.htm