The West Indies voltage and tolerance will vary with which country but they are either 220 or 230v with some 110. The usual tolerance is +10 to -6%. Australia
like UK was nominally 240V and is now officially 230V. New Zealand
is officially 230v +/- 6%.
UK was 240v and went down to 230V (although people still call it 240v) to harmonise with Europe
which went up from 220 to 230. This was achieved without any fuss for consumers (and probably most are unaware the change has taken place) as all products had to be designed to meet the tolerances which were quite wide anyway. The only noticeable effect was that things which used old fashioned linear power supplies like car battery
chargers had a slightly lower output. Switch mode power supplies are unnaffected.
This is a long winded way to say it will be ok