Born in county Durham, Forster was the grandson of Roger Forster (b. 1700), who had established the family’s interests in the south Durham coal industry in the mid-eighteenth century. His father, John Forster, moved to London at the beginning of the nineteenth century to form the merchant house of Forster’s, trading in Baltic timber.
At the 1841 general election, Forster offered as a Liberal for Berwick-upon-Tweed, where his family held property, advocating free trade and a reduction of the sugar and timber duties. The only Liberal in the field, he was returned at the top of the poll, a position which he also maintained at the 1847 and 1852 general elections.
In his first parliamentary session, he was appointed to the 1842 select committee on British possessions on the West Coast of Africa, which was formed in response to the report of Dr Richard Madden, who had been sent to the region by the late Melbourne ministry. (His report had concluded that British traders were complicit in the slave trade.
A persistent questioner of ministers on mercantile issues, Forster’s contributions in the Commons reflected his interests in the shipping and coal industries. An opponent of government interference in commercial matters, he objected to the merchant seaman’s bill, 29 July 1844, duties on marine insurance, 19 July 1847, and denounced the collieries bill as ‘the most absurd and useless bill that ever was laid upon the table of the House’, 14 July 1847. He maintained his defence of British traders on the coast of Africa, 7 Aug. 1844 and 13 June 1845, and, supporting the Russell ministry’s plans to purchase Danish settlements on the Gold Coast, he rejected Richard Cobden’s concerns, dismissing him as ‘exceedingly ignorant on the subject’, 19 July 1850. He was also a prominent protagonist for the British traders Joseph Braithwaite and George Martin, whose trading station at Boke, Guinea, was destroyed by a French and Belgian naval force in March 1849, and pressed the foreign office for redress, although his efforts eventually came to nothing.
Although Forster was re-elected at the 1852 general election, his Conservative opponent, Richard Hodgson, petitioned against his return, 24 Nov. 1852, and he was found guilty, by his agents, of ‘gross, open and systematic bribery and corruption’, 23 Apr. 1853, and his election declared void. Forster launched a counter-petition, 6 May 1853, denying that he had attempted to see off Hodgson’s petition by offering him ‘a large sum of money’, and a select committee into the prosecution of the petition subsequently exonerated him on this issue, 13 June 1853.
