1. Cost of devices.

Device trade name	Material	Cost for device to repair 10 mm gap, 2 mm diameter
NeuroTube	Polyglycolic acid	GBP 580 exc of VAT (November 2018)
Neurogen PNG220	Type I collagen	GBP 689.26 exc of VAT (Nov 2018)
Neurolac (Polyganics)	poly(DL‐lactide‐ε‐caprolactone)	No reply November 2018 sales@neurolac.com and info@polyganics emailed further 7 January 2019 further 18 May 2019
Salubridge	Polyvinyl alcohol	No reply November 2018 info@salumedica.com emailed further 7 January 2019 further 18 May 2019
Axoguard	Porcine small intestine submucosa	USD 1000 equivalent to GBP 789.04 (April 2019)
Avance Axogen	Decellularised cadaveric nerve	USD 1800 equivalent to GBP 1420.28 (April 2019)
RevoInerv (NG02‐0203)	Porcine Type I and III collagen, bovine Type I	GBP 348 exc of VAT (January 2019)

exc: exclusive; GBP: Great British pounds; USD: United States dollars; VAT: value added tax.