CGT confusion

[dotto]

I apologise in advance if this question is muddled.

I purchased a leasehold flat in 2000 for £50,000 which was rented out. At that time CGT was tapered each year the property was owned.

The cgt tax relief changed in 2008 and rather than lose the relief my partner bought half the flat so that I could take advantage of the tapered CGT relief I had gathered. We shared ownership of the flat until March 2014 when I re-purchased his half for the same price he paid for it.

I am about to sell the flat and I will give the figures below.

2000 - I purchased the flat for £50000
2008 - KK bought one half of flat for £66,000 - I submitted a tax return but paid no CGT due to losses on another rentalI property I sold that had been caught up in the floods of
2007
2014 - I bought back KK's half of the flat for £66,000
2017 - I hope to sell the flat for £132,000

I am very confused as to how I work out the CGT.

Any advice would be much appreciated.

[maths]

As at today's date you own 100% of the flat. This is comprised of 50% acquired in 2000 (£25,000) and 50% re-acquired in 2014 (£66,000).

Capital gain on sale = £132,000 - [£25,000 + £66,000} = £41,000.

[dotto]

Many thanks for your reply which is very clear and helpful