A Downing Street spokesperson said:
The Prime Minister called the Chief Minister of Gibraltar, Fabian Picardo, this morning.
She reiterated our long-standing position that the UK remains steadfastly committed to our support for Gibraltar, its people and its economy. The Prime Minister said we will never enter into arrangements under which the people of Gibraltar would pass under the sovereignty of another state against their freely and democratically expressed wishes, nor will we ever enter into a process of sovereignty negotiations with which Gibraltar is not content.
The Prime Minister said we remain absolutely dedicated to working with Gibraltar for the best possible outcome on Brexit, and will continue to involve them fully in the process.