Of course...
The world famous Alex Henshaw barrel rolled Lancasters during production test flights occasionally - a straight 1g maneouvre, usually with something or other balanced on the instrument coaming. He said they handled just like a 4-engined Spitfire...
A 617 Sq. pilot returning from a Tallboy or Grand Slam raid, coming across a straggling B17, barrel rolled his Lancaster
right around it (allegedly)!
617 Lancs were a bit 'slipperier' and lighter than std ones, without a dorsal turret and some other gubbins.Of course, with a 22,000lb Grand Slam hanging half out of their 30 ft bomb-bay, they would struggle to 20,000 ft.
.. and then Geoffrey de Havilland attracted attention to the Mosquito's phenomenal performance with his single-engined loops during demos for the top brass, on both sides of the Atlantic. Very impressive for a twin-engined bomber in 1941
Searchlight escape maneouvres were rapidly descending corscrews... rolling would be pointless.