By Allan Fuller
RNLI is not just around the coast, it is very active on the Thames.
In January this year, Chiswick RNLI and the other three Thames lifeboat stations celebrated 20 years of search and rescue on the tidal river.
No one anticipated how busy the Thames stations would be. Altogether 4,308 people have been rescued and 622 lives saved.
If you ever see an emergency on the Thames dial 999 and ask for Coastguards.