You are sitting on a £100,000 gain, £50,000 for each of yourself and your wife. The first £11,000 gains made by an individual in any one tax year are tax free. So, if you sold the property now, you would each pay CGT on £39,000. You can take account of the selling costs in calculating the gain so the final taxable figure would be something less than £39,000.
I'm assuming that you did not elect for the inherited property to be treated as your main home within 24 months of iinheriting it. The gain made on the sale of a property is treated as having accrued evenly over the whole period of ownership which makes the calculations fairly easy.
The gain for the period the property was the main home of the seller is exempt from CGT as is the gain for the last 18 months of ownership where the seller wasn't living there. The remaining gain is taxable. If the property was let as well as having been the seller's main home at some point, letting relief will reduce the taxable gain by the lesser of:
2 the sum of the main residence gain and the gain for the last 18 months of ownership excluding overlapping months and
3 that part of the letting period gain not covered by the last 18 months of ownership.
You have owned the property for about ten years so if you sold it now you would have made about £10,000 profit per year of ownership. It you move into it for a short period to get 18 months of the gain as tax free, the tax office would almost certainly challenge your motives (they would say you are trying to avoid tax and not to make the property your home) and seek to tax all the gain. I would say that you would need to live in it for at least a year to get any main residence exemption. Even if you lived in it for ten years, only half the gain would escape CGT and that's assuming the CGT rules on property don't change. You would also expose part of any gain on your current property to CGT by making the inherited property your main home, subject to the reliefs mentioned above.
Take a look at the HMRC helpsheet HS283
for more information on CGT and the main home.
I hope this helps but let me know if you have any further questions.