Tried a couple of different English mid-strength (3.6%) draught beers in 500ml cans in the last week. The brews were John Smith’s Smooth Bitter & Tetley’s Smooth Ale.

Tetley’s was disappointing: didn’t help that each of the four cans lost about 15% of their contents upon opening - I had to hold it over the kitchen sink to avoid spillage on other surfaces.
Disappointed in the taste as well. Too insipid. John Smith’s was a maltier, more bitter brew. I’d definitely buy it again.