Preheat the oven to 180°C/160℃ fan/350°F/gas mark 4. Grease a 2lb loaf tin and line with greaseproof paper.
Whisk together the earl grey tea leaves, sugar, yogurt, milk, oil and lemon zest and juice in a large bowl.
2 Tablespoons finely ground Earl Grey tea leaves (about 5 tea bags)*, 200 g (1 cup) caster or granulated sugar, 180 g (¾ cup) vegan yogurt, preferably Greek style, 100 g (6 Tablespoons + 2 teaspoons) unsweetened non-dairy milk (I use soy), 124 g (½ cup + 1 Tablespoon) neutral oil (I use olive), finely grated zest of 2 lemons, 45 g (3 Tablespoons) lemon juice
Whisk in the cornflour, baking powder and soda and salt, followed by the flour.
20 g (2 packed Tablespoons) cornflour (cornstarch), 2 teaspoons baking powder, ¼ teaspoon bicarbonate of soda (baking soda), ¼ teaspoon salt, 270 g (2 ¼ cups) plain (all-purpose) flour
Scrape the mixture into the prepared loaf tin and bake for about 60-70 minutes until a skewer inserted into the centre comes out clean.
Leave the cake to cool in the tin for 10 minutes then carefully turn it out onto a wire rack and leave to cool completely.
Once the cake has cooled make the glaze; sift the icing sugar into a bowl and stir in the lemon juice and yogurt to form a thick but spoonable glaze. Add more icing sugar if it is too runny or more lemon juice if it is too thick.
150 g (1 ¼ cups) icing (powdered) sugar, 1 Tablespoon lemon juice, 1 Tablespoon vegan Greek style yogurt
Spoon the glaze over the cake and serve. Store in an airtight container at room temperature.