Change 'Abstract' to 'Summary' in article class when working with babel and English (UK)

[Roey Angel]

Hi,
I'm trying to change the section name 'Abstract' to 'Summary' in an article
class document with babel enabled and language set to English (UK).
So far I tried to place in the preamble:

    \AtBeginDocument{%
    \addto\captions\captionsenglish{%
    \renewcommand{\abstractname}{Summary}%
    }}
or

    \AtBeginDocument{%
    \addto\captionsenglish{%
    \def\abstractname{Summary}%
    }}

or in the document, an ERT with
\renewcommand\abstractname{Summary}

but nothing worked

I also tried replacing \captionsenglish with \captionsbritish or
\captionsUKenglish, but both didn't work.

Any suggestions?

Roey