24 HTM Official Solve by Daniel Sheppard @ Oxford Open 2014 (UK NR)

Scramble: B2 F2 D2 L2 D B2 U R2 B2 U L2 B’ L D’ L2 D R’ U R’ F’
Solution: D R2 D2 L U2 L’ U’ L D L’ U2 R2 D B D’ B’ F R’ D’ R’ D R F’ R2 (24 HTM)

Explanation:
2x2x3: D R2 D2 L U2 D L’ U (8)
Preserve pair and make Block: R2 D B D’ (12)
F2L and leave 3 corners: B U’ B’ U R U R’ U’ B’ R2 (22)

Skeleton: D R2 D2 L U2 * D L’ U R2 D B D’ B U’ B’ U R U R’ U’ B’ R2
Insert L’ U’ L D L’ U L D’ at * to cancel 5 moves, giving the following 25 move solution:
D R2 D2 L U2 L’ U’ L D L’ U2 R2 D B D’ B U’ B’ U R U R’ U’ B’ R2

Then, I noticed that the last part of the solution is actually a block comm (with a couple of setup moves and some cancellation), so I used the skeleton
D R2 D2 L U2 L’ U’ L D L’ U2 R2 D B D’ B’ * R2, which leaves a block comm
Insert F R’ D’ R’ D R F’ R at * to cancel 1 move and gives the 24 move solution

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