Toshi
Yes, I didn't realize how much ordinance the Lancaster was capable of carrying. It's amazing that it could even taxi down the runway let alone take flight! LOL!
Just to put it in perspective, that single cylindrical bomb in the middle of the bay (a 4,000 pound "blockbuster" AKA "cookie") represents the equivalent typical bomb load (by weight) for a B-17 Flying Fortress. In addition, there are 18 500 pounders, making a total in this configuration, of 13,000 pounds.
Remember also that later versions (with a reconfigured bomb bay) could carry the massive 10-ton "Grand Slam".