Thanks for your question - I am Sam and I am one of the UK tax experts here on Just Answer.
Yes you will have a capital gain consideration of the £27,500 gain but there will be some exemption as the period from Jan 2010 to July 2014 along with the last 18 months of ownership will form exemption under the private residence rules.
So in essence only 7 months (of the transfer/sale is completed by July 2016) will be liable so 7/ total ownership of 78 month x share of gain £27,500 = £2467 liable
As this is under the £11,100 annual exemption threshold you will have NIL gain to pay
Let me know if I can assist further
Thanks for your response
The 7 months comes from the fact that you left July 2014 and if you transfer by July 2016 that is 25 months of the 78 that would need be considered but of the 25 months the last 18 months are exempt (along with the time you lived there) -
So that leaves 7 months out of a total ownership of 78 months to consider for capital gains