DSC 0789 - Fluorescent tube roundels!

Southwark tube station has installed fluorescent style tube roundels for a few short days (16-19 June) to celebrate the opening of the new Tate Modern extension. Three different colour styles were used.
I went along to have a look.
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The eastbound platform with green on pink roundel
DSC 0789 - Fluorescent tube roundels!
Pink on green roundel designed by artist Michael Craig-Martin
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The roundels are obviously those quick to apply decals – just peel off when needed!
standard - Fluorescent tube roundels!
Article in the London Standard (16/06/2016) this shows the blue on pink roundel.
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I spotted the station supervisor featured in the Standard’s article!
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At the side of the roundels is this description referring to the artist & the Tate.
Other sources featuring the new roundel: Londonist; FAD Magazine.