Lynda Chalker was indeed Minister of Overseas Development & Africa - appointed by Margaret Thatcher in 1989 to 1997 - in 1992 she lost her seat in the HoC and was given a life peerage to the HoL so kept her ministerial position.
Interestingly she also used her Overseas Development experience to found a Consultancy company in 1998 (after the Cons lost power) called "Africa Matters" which offered paid consultancy services to companies and businesses wanting to do business or expand their business with Africa. She remained on the board until she resigned in 2016.
Even more interesting is that her business consultancy activities with Africa Matters overlaps with her directorship and place on the board at Senetable - appointed in 2013.
Makes me wonder about potential conflicts of interest and whether Senetable bought business consultancy services from Africa Matters?