There is a wealth of information on the DSA website to support with health and well being as a first port of call.
PADS have created 2 groups on Facebook to support with toilet training, where professionals and parents can offer practical advice and support –
DSUK Going POTTY! Toilet training advice 4 children under 5 w down Syndrome
DSUK Toileting issues 4 children & young people w Down Syndrome aged 5+.
The following link is a fun video to support toilet training. Toms toilet triumph!
The following app is another resource that could be useful during your toileting journey.