Check out Dick Newell's latest blog about Swift bricks
https://cieem.net/swift-bricks-the-universal-nest-brick-by-dick-newell/
The Cardiff swift survey is in its third year. We've got 26 keen volunteers going out surveying their local areas. We await the results of their findings with interest.
Mary Gallagher has found nesting Swifts in Porthcawl and a group from the RCL Nature Partnership found a nest in Ferndale. Keep searching folks.