Gunjani wrote:

I ask this because at my previuos employment we were entitled to a
morning & afternoon paid 10min tea-break and 1 hour unpaid lunch-break.
But in the railway industry its reported that all employees are entitled
to 20 minutes unpaid break AFTER working for 6 hours... Is this true,
but more importantly acceptable?

It's true. That's the lunchbreak. If you work more than a six hour day,
you're entitled to a 20 minute break. Most workplaces will insist you
take at least half an hour.