Tricky, Ivo. Hajdamach struggled to find a handful of attributable English examples, and it doesn't help when some were decorated outwith the glassworks, and the Bohemian? decorators moved around, not just within Birmingham/Stourbridge/Manchester/London, but from country to country.
You might try photographs to Simon Cottle and Roger Dodsworth, but don't be optimistic that you will get anything other than a stock response — probably along the lines of "possibly Richardson", or "Bohemian", whatever that means.
Date — Hajdamach dates them from about 1840. His end dates of around 1860–70 are fine for specific examples, but much too early for the general style.
Yours looks an nice example with unworn decoration. You don't see many like it.
Bernard C.