I can't envisage a problem with the human rights issue, I mean it's not like Saudi Arabia is blackballed by the UK. In fact, the trade between both countries is strong.
The total goods exports from the UK to Saudi Arabia in 2017 were worth about £4.2 billion, an increase of 120% compared with ten years earlier. Goods imports from Saudi Arabia were worth £2.4 billion (also more than double the figure for ten years earlier). So the UK had a surplus of £1.8 billion in goods trade. We also import oil from Saudi.
Did the human rights activists stop this?