By David Wallace Lockhart
Political correspondent
A caller instrumentality is acceptable to beryllium passed by the Scottish Parliament which volition simplify the ineligible process for anyone successful Scotland who wants to alteration their gender.
But the signs are that the UK authorities could garbage to recognise it, causing immense issues for radical affected who privation to relocate elsewhere successful the UK.
Since 1998 immoderate laws which use successful Scotland are made by MSPs successful Edinburgh, portion others are made by MPs astatine Westminster.
Legislation present successful the Scottish Parliament volition shorten the timescale for anyone who wants to get a sex designation certificate, a papers allowing idiosyncratic to alteration their sex connected their commencement certificate.
Gender designation certificates let radical to alteration definite ineligible documents, and tin impact areas specified arsenic entitlement to benefits and pensions.
The authorities is presently making its mode done the Scottish Parliament and is apt to walk aboriginal this month.
UK authorities ministers are liable for the instrumentality successful this country successful England and Wales, and person nary plans to determination successful the aforesaid absorption arsenic the Scottish government.
Legal challenge
But they whitethorn spell further by refusing to recognise documentation issued nether the caller Scottish strategy successful different parts of the UK.
A UK authorities root adjacent to the process told the BBC this was "absolutely" possible.
The Westminster authorities is besides not ruling retired the imaginable of a ineligible situation erstwhile the authorities is passed by MSPs. It believes the caller instrumentality whitethorn person an interaction connected areas wherever argumentation is decided successful London.
Asked if determination could beryllium a ineligible situation to the Scottish legislation, the root told the BBC "nothing tin beryllium ruled out".
Scottish authorities ministers person said they are blessed to conscionable their UK counterparts to sermon their concerns - and officials successful Edinburgh said they had tried to acceptable up talks successful October, without immoderate response.
The SNP-led authorities believes the measure involves powers held solely successful Edinburgh, truthful the UK authorities would not person grounds to equine a ineligible challenge.
The UK government's Equalities Secretary Kemi Badenoch has written to the Scottish authorities expressing concerns astir the Scottish legislation, and has offered to conscionable Scottish ministers to sermon it.
'Nasty Westminster'
Our UK authorities root told the BBC that they had concerns radical from elsewhere successful the UK whitethorn relocate to Scotland to alteration gender.
And they claimed Scottish ministers wanted to overgarment Scotland arsenic a "haven of inclusivity" successful examination to a "nasty Westminster".
The root described the Scottish authorities arsenic a "test lawsuit scenario" of however a measure passed by the Scottish Parliament could "undermine Westminster competencies" - successful different words, handing Holyrood powers extracurricular Scotland.
A abstracted UK authorities authoritative told the BBC determination was "genuine concern" astir the interaction the authorities could person crossed the remainder of the UK. They added that they hoped a ineligible conflict could beryllium avoided.
Scottish Social Justice Secretary Shona Robison has said she would beryllium "happy to conscionable with Ms Badenoch" to sermon the issue.