A web search will reveal some UK providers of metal 3D print services – you may have to look closely at web sites to confirm actual location (some sites may be a UK page for a service actually provided from elsewhere).
The range of metals that can be processed this way is much wider than it was a few years ago.
I’m aware of 3 major processes (but I could be out of date)
Powder bed with laser melting (SLS)
Powder bed with electron beam melting
Extruded filament, followed by sintering
Most providers will offer a facility to upload CAD files for quotation.