No, you'll need to insert it yourself. FWIW, its poor netiquette to change
the format unless you have a valid reason - and formatting the signature
isn't valid enough. Bullet points and highlighting text in a reply is a
valid reason. The sender may be able to accept HTML normally but reads
email on a mobile phone which does not support HTML or charges by the byte.

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> Hi,
>
[quoted text clipped - 11 lines]
> Many Thanks
> Steve