I have gone into this myself and worked out the following. Centre is the Centre tank. Centre 2 is the Fin tank. Left Aux is No. 1, Left is No.2, Left Tip is No. 1A, Right Aux is No.4, Right is No. 3, Right Tip is No. 4A. The following are taken from the BOAC instructions for fuel loading.
Minimum fuel for take-off = 10,000 kg. Fuel load 10,000 kg to 17,600 kg equally loaded into tanks 1, 2, 3, and 4 only. Fuel load 17,600 kg to 24,000 kg, tanks 1 and 1A to equal within 150 kg and similarly for tanks 4 and 4A. Also the total of 1 and 1A shall equal tank 2 to within 150kg, similarly for the other side. For loads 24,000 kg to 29,000 kg, load 24,000 kg into wing tanks as above and up to 5,000 into the Centre tank. For loads above 29,000kg, load 5,000kg into centre tank. Load remainder into wing tanks as above until 1A and 4A are full, then equally into 1, 2, 3, and4 until full, then into centre and Fin tanks in ratio 2.3 centre to 1 fin. Hope this all makes sense.