The 1S-Series sub-miniature rocker switches from Carling come in sealed and sealed surface mount variations and have contact resistance of 20 mΩ max with initial @ 2-4 VDC 100mA for both silver & gold plated contacts. Further specifications are provided in the data sheet.
Comment: The UK is closer to deindustrialisation than reindustrialisation
"..have been years in the making" and are embedded in the actors - thus making it difficult for UK industry to move on and develop and apply...