[garinda]

I know what you're saying, and as a child I was also brought up to offer my seat, if an adult was standing.

Suprisingly in London, one of the most insular places in the world, i.e. keep reading your book whilst someone next to you is being mugged, people do give up their seat on the Tube, if someone is obviously more in need.

The only trouble is a person's ability to stand isn't always that obvious.

That frail looking little old pensioner might run three marathons a year, and that surly hoodie might be a double amputee.