Huge Vintage  sign, originally from RAF Halton in Buckinghamshire, this may be a slightly unfortunate piece to be selling during a global pandemic.
It measures about 7m long when laid end to end, each letter approximately 20cm high. D.2cm
I think the letters are either brass or bronze. the frame may be aluminium.
the letters would clean up beautifully, but I rather like it in it's worn state.