who is this actress???

[TheCoralDog]

okay so i saw her in london this weekend and it's bothering me.
shes between 45 and 55. Blonde flicky shirt bob. sexy eyes. very pretty with a distinctive english, posh, clipped accent. fairly tall.

Holliday Grainger or Sienna Miller

i feel like all these people aren't too far off but they are too famous. like this person has been in british tv shows. and i feel like she may have played a sexy older woman villain type

Gwendoline Christie

@TheCoralDog

You need to list who it is not from the suggestions!

Lucy Punch i.e Amanda in Motherland and Amandaland?

Hermione Norris

Hermione Norris from Cold Feet?

Anne-Marie Duff
Helen George

Kelly Reilly, Sheridan Smith

Susannah Harker

Mariella Frostrop

Morgana Robinson?

Glynis Barber? Might be a bit older than 50s but otherwise sounds like her. She lives in Putney, I used to see her and her husband (Michael Brandon) about.

.. Gosh, just seen she's 71! She looks amazing!

Hermione Norris did a turn as a posh villain in Luther?

Bit over your stated age range, but Kristin Scott Thomas?

Katherine Kelly, Sarah Parish?

Emily Berrington? Striking eyes

Rosamonde Pike
Alice Eve
Annabelle Wallis

Elizabeth Debicki

Imogen Stubbs?

Billie Piper.

May be way off the mark but I immediately thought of Sarah Lancashire.

Samantha Bond

Sian Brooke?

I’m not sure Phoebe Dynevor’ll be thrilled to be mentioned as looking 45-55. She’s 31!

Lesley Sharp
Jodie Whittaker

Not 'posh' accent though

Sarah Alexander?