Estimated position with tidal stream, diamond K

Exercise book 4.5 · on paper you need RYA chart 3, the tidal almanac, the deviation card

On Sunday 23 June at 1450 SPDST you are at 45°55.96'N 005°37.27'W with the log at 12.2; at 1550 SPDST the log reads 19.2. You steer 270° by compass in an easterly force 3, leeway nil. Variation 6°W. Use tidal diamond K. Where are you (EP) at 1550?

Starting position: 45°55.96'N 005°37.27'W
Log: 12.2 at 1450, 19.2 at 1550 SPDST
Compass course: 270°C
Variation: 6°W
Victoria 23 Jun (UT): HW 0850 5.3 m; LW 0234 1.1 m, 1503 0.9 m
Diamond K, HW+4: 291° 2.0 kn springs / 1.1 kn neaps
Diamond K, HW+5: 298° 3.3 kn springs / 1.7 kn neaps

Solution worked out by us from the course material: to be checked by the instructor.