Cari - The flat side of the needle shank would only fit if it was to the left, which seemed odd if the machine threads left to right. The convention contradicts my other singers and bernina. I wonder if it is full of gunk
Mickey and Ourworkbench - When I am able to get out an about (we are snowed in - the UK can't handle snow!), I am going to get some proper cleaning supplies and oils and get to cleaning and I will pay particular attention to the tension assembly. It most likely is just crud. The previous owner had it from new and had passed away. Her son-in-law said that it hadn't been used since the 70s. While the lacquer, lovely scrolls etc are perfect and underside is bad. Hopefully, it will be just a case of some TLC.
I will report back on when I am finished.
Thank you so much for all your tips
HettyB