The first thing to say here is that it is much easier to make a claim under EU Regulation 261/2004, if it applies, rather than under the Convention.
Regulation 261 applies to all flights leaving the EU and to all flights returning to the EU on an EU or UK registered airline, so for the vast majority of cases UK citizens flying out of the UK they will get the protection of Reg. 261 and its standard tariffs for delay.
If you do not qualify under Reg. 261 you may be able to make a claim under the Convention.
If a passenger is delayed the compensation is more generous than if your baggage was delayed. You are entitled to up to 5,346 SDRs.
Unlike Reg. 261 where compensation is given automatically according to a pre-determined scale you will have to prove what your losses are e.g. the cost of hotel accommodation you could not take up because of the delay.
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