This is the absolutely gorgeous yellow flowering current, Ribes odoratum. Whilst the small flowers are certainly pretty enough as they clothe this large shrub it is their wonderful scent that is a winner. Some gardening sites consider the scent to be clove-like but to me it more of a mix of honeysuckle and lily, with some hyacinth thrown in for good measure. In my garden it is planted opposite my back door so I catch the sweet scent whenever I walk out of the house, making a real lift on a dull day.