By Holly Williams, PA Business Editor & Lawrence Matheson Topps Tiles has warned over a hit to first-half profits as under-pressure homeowners continue to put major home improvement projects on the back burner. The group reported an 11.3% tumble in like-for-like sales in its second quarter to March 30. It sees the group’s sales woes deepen, with the decline picking up pace since the 7.1% drop seen in the previous quarter, although Topps said the second-quarter performance was also impacted by the timing of Easter holidays this year. The group said: “Subdued demand in the domestic repair, maint…