Turnstone Guitar Company was founded by luthier Rosie Heydenrych in Surrey, UK. Heydenrych makes customised fine steel string acoustic guitars by hand. Her Turnstone E-Series uses only English native woods.

Source: Turnstone Guitar Company website (7 June 2019)

Egon Rauscher has been hand-building electric guitars since the late 1990s under the brand name Soultool. Soultool is based in Buttikon, Switzerland. Initially Rauscher offered two models based on the Fender Stratocaster and Telecaster, but circa 2019 Soultool's designs are original, beautifully made using certified hardwoods and the best hardware and electronics.

Source: Soultool Customized Guitars website (7 June 2019)

Avishay (Avi) Shabat graduated from the Algranati Guitar Making School in Israel before moving to Los Angeles to apprentice for guitar repair shops and work for a boutique guitar company. Avi spent the next four years building handmade instruments, and founded a company of his own, Guitar Groomer, where he restored and repaired guitars and basses from his home workshop. In 2012, Avi expanded his repair business and began designing and building his own instruments, launching a new line of handmade electric guitars and basses—Shabat Guitars.

Source: Shabat Guitars website (6 June 2019)

Luthier Michael Sankey of Sankey Guitars has been making and repairing guitars since the mid 1990s. He initially specialised in archtops but now also makes outstanding and original custom electric guitars.

Source: Sankey Guitars website (5 June 2019)

Bird Amplifiers were made from the late 1950s until the mid 1960s by Sydney S. Bird and Sons of Poole, Dorset. Sydney Bird's company started out in the 1930s in Enfield making toys and electronics. They relocated to a larger factory Poole in 1953 and diversified into other products including electronic organs and in the late 1950s they added guitar amplifiers to their product line. The company stopped making amplifiers by 1966 in the face of strong competition from other British amplifier companies of the era.

This brand is not related to "Bird Brothers" amplifiers - these amplifiers were distributed in the 1970s and 1980s by brothers Peter and Arthur Bird who operated some music shops around Manchester, UK.

Source: Tim Fletcher and Steve Russell (4 June 2019)

Red Layer Guitars are made in Amsterdam by Jort Heijen. He founded his own guitar making workshop in 2015 after studying woodworking for 4 years while also attending internships at Adamovic Basses in Haarlem. His main model is an 8-string guitar inspired by an 8-string bass he helped build at Adamovic for Meshuggah bassist Dick Lövgren

Source: Red Layer Guitars website (27 May 2019)

Padalka guitars and basses are made by Simon Padalka in his one-man workshop in Krasnodar, Russia. The basic Padalka styles are: Superstrats, Headless Guitars, Ennea Bass, Headless Basses, Sun and Sun Bass but customers can choose from a range of headstock styles, woods , cavity covers and set-net or neck bolts.

Source: Padalka Guitars website (27 May 2019)

Barlow electric guitars are handmade by Ricky Barlow in Long Island, New York. Made using rare and exotic tonewoods. Barlow attended the Roberto-Venn School of Luthiery in 2009 and then worked for Paul Reed Smith Guitars. He launched Barlow Guitars in 2015.

Source: Barlow Guitars website (23 May 2019)