Preheat oven to 180C/gas 4/fan 160C. Line a baking sheet with non-stick parchment. Slowly bring the butter, cream and sugar to the boil, stirring. Take off the heat and stir in the nuts and flour. Spread half the mixture in a 20cm round on the baking sheet. Bake for 10-12 minutes until lightly browned. Cool for 2 minutes on the sheet and then transfer to a rack to go brittle and crispy. Repeat with the other half.
Beat the cheese until softened, and then gradually beat in the milk, lemon and lightly whipped cream. Chill for 2-4 hours until softly set.
Squash four strawberries through a sieve into a pan. Add the sugar and redcurrant jelly and heat gently, stirring to dissolve. Boil for 2-3 minutes to make a syrup, then cool.
Slice the remaining strawberries. Break the biscuit into shards. Layer the cheese mixture, strawberries, syrup and biscuit in glasses, reserving a few pieces. Chill (up to 2 hours ahead). To serve, top with the remaining biscuit.