This a great source of reference photos for your modelling...... The London Science Museum..... https://collection.sciencemuseum.or...ritish-transport-films-collection-photographs
And this site as well..... https://colourrail.co.uk/?_ccCt=gO_DcqR~jnEl1lnYvepyaSpuYqXdCivuHeiYyu3BcHiPXNvJR9~Jgd~gqpRqXqVn