Consolidation: Ready for Year 3

Capstone and KS1→KS2 bridge: problem solving across all strands at Y2 ceiling depth, plus an explicit preview of Year 3's opening ground — numbers to 1,000 ('what if we had ten tens tens?'), the 3, 4 and 8 tables ahead, and column methods as 'writing down what our apparatus already does' — mapped to M_UK_Y03_M01–M03.