From Amazon
ProDec Trojan 6 piece Synthetic Paint Brush Set for a Smooth Finish Painting with Emulsion, Gloss and Satin Paints on Walls, Ceilings, Wood and Metal - 2x 1.5, 3x 2 and 1x 3 inch Brushes
Wickes
ProDec Trojan Decorator Paint Brush Set - Pack of 6