I cannot believe I have just paid £40 for this "high level of detail". It is a shameful piece of extortion. The answer completely avoids the question, as in England, citizens do not pay tax on pension lump sums. Neither do they pay tax on money they gain from house sales. These are always tax free. Are you saying that the Spanish tax authorities will effectively take £75 000 from me in tax before I even step foot in the country?
I am sorry to say that if you sell as you are permanent resident in Spain you will have to pay
The profit you got on the business is charged in Spain 19 per cent of the first 6000 euros of the profit and 21 per cent the rest of the profit
So, in my opinion your better chance is not to have permanent residence in the year you sell and to have residence this year in UK and avoid to pay taxes
As long as they see the money in the account as you were in Spain you could be charged with taxes
I am sorry to say that I have no idea about taxes in UK, but for sure you will have to pay taxes in Spain if you sell and you are resident in Spain in this moment
I will be here if needed, please ask so many times as you need