As far as I see in my Corpo Booking Tool is is a permanent change for Fridays (checked for 10 June and 17 June):
10JUN FRI LGW/Z‡1 ALC/‡1
1U2 8659 W9 B9 Y9 LGWALC 0550 0920 319 0 IA
2ZB 262 S LGWALC 0910 1240 321 0 /E
3U2 8663 W9 B9 Y9 LGWALC 1220 1550 320 0 X7 IA
4BA 2630 J9 C4 DC RC IC LGWALC 1330 1705 320 M 0 5 DCA /E
Y9 B4 HC KC MC LC VC NC QC OC SC GL
5IB/BA 7594 J9 CL DC RC IC LGWALC 1330 1705 320 0 156 DCA /E
Y9 B9 HC KC MC LC SC OC QC VC NC
6ZB 264 S LGWALC 1550 1920 321 0 /E
7U2 8667 W9 B9 Y9 LGWALC 1750 2120 320 0 X6 IA
8U2 8671 W9 B9 Y9 LGWALC 1945 2315 319 0 IA
9BA 2632 J9 C6 D3 R8 IC LGWALC 2010 2335 320 M 0 DCA /E
Y9 B9 H9 K9 M9 L9 V2 NC QC OC SC GL
10IB/BA 7590 J9 C9 D9 R9 IC LGWALC 2010 2335 320 0 DCA /E
Y9 B9 H9 K9 M9 L9 SC OC QC VC NC
17JUN FRI LGW/Z‡1 ALC/‡1
1U2 8659 W4 B4 Y4 LGWALC 0550 0920 319 0 IA
2ZB 262 S LGWALC 0910 1240 321 0 /E
3U2 8663 W4 B4 Y4 LGWALC 1220 1550 320 0 X7 IA
4BA 2630 J9 C5 D2 RC IC LGWALC 1330 1705 320 M 0 X7 DCA /E
Y9 B9 H5 KC MC LC VC NC QC OC SC GL
5IB/BA 7594 J9 C9 DC RC IC LGWALC 1330 1705 320 0 156 DCA /E
Y9 B9 H9 KC MC LC SC OC QC VC NC
6ZB 264 S LGWALC 1550 1920 321 0 /E
7U2 8667 W4 B4 Y4 LGWALC 1750 2120 320 0 X6 IA
8U2 8671 W9 B9 Y9 LGWALC 1945 2315 319 0 IA
9BA 2632 J9 C6 D3 R1 IC LGWALC 2010 2335 319 M 0 DCA /E
Y9 B9 H9 K9 M9 L2 VC NC QC OC SC GL
10IB/BA 7590 J9 C9 D9 RC IC LGWALC 2010 2335 319 0 DCA /E
Y9 B9 H9 K9 M9 LC SC OC QC VC NC