On 29/08/2020 12:48, John Towill wrote:
I have a light fitting that on replacing the florescent tubes tow small
pieces ofÂ* hard plastic broke off rendering the light useless. What
adhesive, if any, would be suitable to glue them back into place please?

There is probably nothing that can repair that sort of embrittled
plastic and provide the strength it needs to be a retaining clip.
Your least worst option is probably to reassemble and glue it together
with epoxy. Accepting that next time around it is scrap.

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Regards,
Martin Brown