>>>Do you think they are any better than just the regular oils from Holland and Barrett?
No, I don't.
Further, from the NHS website:
"Despite claims that fish oil supplements can help prevent numerous conditions including cancer, dementia, arthritis and heart problems, there is little hard evidence for them. Although they are “natural” products (albeit in a processed form), this does not mean they are safe or suitable for everyone.
While omega-3 supplements are sometimes advised for people who have had a heart attack this supplement is typically used under supervision of a healthcare professional.
If you are thinking of taking omega-3 supplements, talk to your GP or the healthcare professional in charge of your care first."
Source:
http://www.nhs.uk/news/2013/07July/Pages/fish-oil-supplements-linked-to-prostate-cancer.aspx