This is a Square 90 Degree Gutter Angle in black from Polypipe
Price: £9.35 from Plumbing Place
This is a Square 90 Degree Gutter Angle in Brown from Polypipe
This is a Square 90 Degree Gutter Angle in White from Polypipe
This is a Square 135 Degree Gutter Angle in black from Polypipe