We used Thomas Sanderson for our shutters and they are stunning. They're made in England, not in China or the far East like many other brands. They're solid wood (not MDF) and spray painted so no cracking. The mechanical parts are very sturdy and there is no wobbling of the shutters when you go to open or close the blades. The stability is due to the positioning of the rod that connects the blades. The rod is located on the far right side of each shutter, which makes them invisible from the outside, and makes the shutters look so much nicer! The warranty is 25 years too. If you need to change the existing shutters within 5 years, Thomas Sanderson gives you 50% off that order.
We used Thomas Sanderson in our previous home and loved them, so we've done it again for our new home here in Wandsworth. Can't recommend the customer service enough or the craftsmanship and professionalism of the installers.