[NTG-context] Changing the caption on a split table

I have a 5-page table placed using \setupcaption [table] [way=bytext,prefixsegments=none] \placetable[split]{My long table}{...} The caption for the first table page is "Table 1a My Long table"; for the second table page it is "Table 1b My long table" and so on. I'd like to change these to be "Table 1 My Long table" then "Table 1 (cont'd) My long table" for the remaining pages. I've tried \setupcaption[table][suffix={(cont'd)] but that affects all the pages. How can I set it for the second and subsequent pages only, please? — Bruce Horrocks Hampshire, UK