Final answer:
The provided reference materials do not offer specific information on the exact number of seats gained by the Conservatives in the 1884 elections that could be attributed to colonial policy, and conjecturing an answer without direct information would be inappropriate.
Step-by-step explanation:
The question refers to the Conservative Party and their gains in the 1884 elections, potentially as a result of colonial policy. However, the provided reference materials do not contain specific information on the 1884 elections or the exact number of seats gained by the Conservatives as a result of colonial policy during that period. The provided materials instead discuss a range of historical reforms and policies in Britain and its colonies, including the expansion of suffrage in the 19th century, mercantilist policies, representation reforms, and colonial governance.
As the 1884 election data isn't directly present in the reference materials and considering the importance of historical accuracy, it would be inappropriate to conjecture an answer without access to the specific information on the 1884 electoral gains for the Conservative Party.