I was going to say something similar to @gbj_tester and was thinking you would need to remove the ballast but there are apparently plenty of direct LED replacements so you might be fine, providing it fits in other ways.
For example https://www.any-lamp.co.uk/osram-dulux-te-led-7w-840-2-pin-replacer-for-7w-4058075559370
Thanks! That's the website I was on earlier. I did consider just calling them up once I have the lamps and old bulb in front of me.
@hoefla started
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I was going to say something similar to @gbj_tester and was thinking you would need to remove the ballast but there are apparently plenty of direct LED replacements so you might be fine, providing it fits in other ways.
For example https://www.any-lamp.co.uk/osram-dulux-te-led-7w-840-2-pin-replacer-for-7w-4058075559370