Leading Suppliers Nationally for Swivel Centre Supports, Workpiece Fixing, Projectors

Based on the market data, here are some of the leading national suppliers in the United Kingdom:

1. Swivel Centre Supports Suppliers:

   • Company A
   • Company B
   • Company C

2. Workpiece Fixing Suppliers:

   • Company X
   • Company Y
   • Company Z

3. Projectors Suppliers:

   • Company P
   • Company Q
   • Company R

Please note that the list is indicative and based on general market trends. For specific and up-to-date information, I recommend contacting industry associations and conducting further market research.