The entire Epping to Ongar branch was a single track line with one passing place at North Weald station, although this loop was taken out of service between 1888 and 1949, and again from 1976. Between 1949 and 1976 two Tube trains could use the branch, although they were limited to four cars in length because of the restriction on the available traction current, as well as by the restricted platform lengths at North Weald and Blake Hall. The service was reduced to one train after the southbound track at North Weald was lifted. It was therefore never suitable for heavy use, and the line was reportedly never profitable. For much of its latter years, the service only operated during Monday to Friday peak hours, and London Transport closed Blake Hall station, the least used on the entire system, in 1981. The line itself continued in use and there was a brief re-introduction of all day services in 1990. However, a system wide cost-cutting exercise saw the service return to peak hours soon afterwards, with an even more skeletal service than before. The line was under threat of closure for many years, and it was finally closed on 30 September 1994.