Unfortunately not, @Philip Gittins.

Your cheapest option is probably a data only eSIM if you’ve got a handset with eSIM support, otherwise pick-up a local SIM card when you arrive in Thailand. 

Using your iD SIM in Thailand would be charged as follows:

Hi @Philip Gittins,

Welcome to the Community!

It looks like @andewhite has answered your query. 

If you require further assistance, please let us know.

Kash