Sir Alan Duncan has apologised after a "mischievous colleague" used his account to tweet the word "bollocks" to a BBC journalist.
The message from the Conservative MP's account was in response to a post shared by BBC political editor Laura Kuenssberg, in which Steve Baker MP criticised the delayed meaningful vote on the Brexit deal.
Sir Alan denied he had sent the message to BBC political editor Laura Kuenssberg, accusing a colleague of taking his phone to write it.
The MP offered up a clue as to who the perpetrator was, writing that they regularly used "extremely long hashtags" on Twitter, leading to speculatation over who was behind the message.
He wrote: "Less anyone think otherwise on seeing I've tweeted #bollocks to @bbclaurak please rest assured this was done by a mischievous colleague on my phone.
"He shall remain nameless!! #hedoesveryveryveryextremelylonghashtags."
The tweet, which happened in the wake of the news that a vote on the Brexit deal had been called off, drew criticism from some.
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One Twitter user wrote: "Glad to hear you and your pals are having a good old fiddle whilst Rome burns."
Another posted: "Your commitment to network security is an inspiration to us all!".