Helen Castell

Helen Castell – Editor

Meticulous copy editor, proofreader and financial journalist


Meticulous copy editor and proofreader who also brings to the table more than 20 years' experience as a financial journalist.

My deep understanding of business and finance positions me well to polish non-fiction titles in this field, with a particular focus on trade finance, energy, commodities, derivatives, insurance and development finance.

I have also freelanced as a copy editor and proofreader for publishers including Penguin Random House and edited several self-published fiction titles - an area In which I'm keen to gain more experience.
Business & Management Travel
English (UK) English (US)

Work experience


Jul, 2002 — Present

Freelance writer and editor. I work mostly as a financial journalist, but also provide copywriting services for corporate clients such as AIG, Aronova and Lloyds, producing market materials, writing speeches or ghostwriting articles. I have also proofread and copyedited a number of Rough Guides travel books, as well as self-published fiction titles.


Trade is being weaponized – and this is not good. As politicians on both sides of the Atlantic raise the stakes, trade is increasingly a tool of coercion to achieve strategic influence. This book looks at the risks for us all as trade becomes an instrument of ... read more
The Rough Guide to Kenya has been the most authoritative guide to the country since it was first published in 1987. The fully revised, full-colour 11th edition covers the country in fine detail. Learn how to cope with and enjoy Nairobi; visit the Maasai Mara w... read more
World-renowned 'tell it like it is' guidebookDiscover Portugal with this comprehensive, entertaining, 'tell it like it is' Rough Guide, packed with comprehensive practical information and our experts' honest and independent recommendations.Whether you plan to ... read more
Discover this vast and varied South American country with the most incisive and entertaining guidebook on the market. Whether you plan to hit the beaches of Rio, take a boat up the Amazon or explore the gorgeous colonial towns of Minas Gerais, The Rough Guide ... read more
A comprehensive guide into the strategies of the executive search professional that can be easily adopted by you and your business. Full of strong ideas and practical solutions that will enable you to lower costs, improve time scales and make sure you hire the... read more

Helen has 6 reviews





David N.

David N.

Sep, 2023

I was grateful for the attention to detail and clarity that Helen delivered. My book (54k words, non-fiction, business related), was in need of a careful final edit and Helen was able to provide me with a marked-up version that I then incorporated into my draft. She then reviewed the typeset output once more and delivered a final set of edits picking on a couple of formatting and punctuation i...
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Corey G.

Corey G.

Jun, 2023

Helen provided excellent feedback and was patient as my timeline got extended a few times. Couldn't have taken the next step with my book without her.
Henry C.

Henry C.

Oct, 2022

Helen was amazing! Super through and really appreciate her sharp eagle eye for proofreading the manuscript!! Thank you!
Simon H.

Simon H.

Aug, 2021

Helen was fantastic to work with; I would highly recommend her to anyone, particularly non-fiction authors like me. As a copy editor and then a proofreader, she provided detailed, constructive and informative comments and mark-ups on my text. Working with her has been a truly collaborative process, and she has been instrumental in helping me ensure my book is clear, consistent and grammatically...
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Radim M.

Radim M.

Oct, 2020

Exactly the help I was looking for.

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