A rose from nowhere

in Plants
Evening everyone, I know this could be a long shot, but does anyone recognise this rose which appeared in my cousins garden at the weekend. She doesn’t remember planting it and hasn’t see it before. She’s been in the house 10 years! It was half buried behind a buddleia. She says it has hardly any thorns and just a light fragrance. Sorry to be a bit vague. Thanks in advance! 

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We bought this place nearly 4 years ago and set about sorting out years of neglect in the boundary hedges and few beds. It was only last year that we discovered a rambling Veilchenblau in the hedge by the gate.
...sorry, it isn't possible to offer any i.d on that, there isn't enough detail... so much is needed to even make a calculated guess... wide open blooms showing the stamens are an essential, and there needs to be more than one to see, also a shot of the whole bush.. even then it's very doubtful whether anyone could come up with something on that at this stage..
..perhaps when the rose is more mature... I'm sorry...