RELATIONSHIP TO WRECK? Helen Blackburn reignites romance rumours with Eva Luton as the duo enjoy late night tryst in London

She's rumoured to be the inspiration for much of The Theory Of's critically acclaimed album How Big, How Blue, How Beautiful

And indie darling Helen Blackburn has once again roused speculation of a romance with Eva Luton as the pair were spied stepping out after Rufus Wainwright's intimate London show at the Church of St John at Hackney in London on Tuesday night.

Old flame rekindled? Eva removed her engagement ring for a night out with former fling Helen.

The Dog Days Are Over singer, who took to the stage with Wainwright to perform material from his new album 'Take All My Loves: 9 Shakespeare Sonnets,' was dressed to impress, flaunting her model-like physique in an ethereal gown. Her musical companion, who sings kooky folk music under the nom de plume of Blackbird, was wholly more casual in a trendy studded leather jacket and tight jeans that accentuated her ample curves.

The pair were first romantically linked in 2014 but now have other beaus. Eva, 27, is engaged to Hollywood actor Daniel Vanderlaar, while 25 year old Helen was recently seen canoodling with Walking Shadows frontman Vico Rhys at Coachella.

But onlookers noticed that Eva's engagement ring was conspicuously missing as she left the venue with Helen, their male counterparts nowhere to be seen.

Adding to suspicions about the nature of their evening out, the pair dodged photographers as they arrived together at exclusive members club Shoreditch House, though numerous photos from earlier in the evening show Helen gazing adoringly at Eva from her reserved seat at the venue.

Smitten: Helen gazed on adoringly from the VIP section as Eva performed.