EU REACH testing for selling in UK

Hi there

Im looking to import some steel bottles and would like to know about REACH testing.

1. How recent should the REACH test report given by supplier should be?
2. What should be the sample size for REACH testing, is there a minimum we need to test per 100 pieces?
3. Is there any other testing we need to comply with to sell in UK/EU?

Any experience regarding REACH testing will be helpful.
Thanks