There are loads of Lyca offers that still seem to be running, not just this one. Found all these links in just five minutes, all are for first six months only, arranged by price:
3GB for 1p/month - lycamobile.co.uk/ucu…GB/
4GB for 5p/month - lycamobile.co.uk/ucu…-1/
5GB for 80p/month - lycamobile.co.uk/ucu…GB/
6GB for 85p/month - lycamobile.co.uk/ucu…-2/
15GB for 94p/month - lycamobile.co.uk/ucu…-3/
10GB for £2.50/month - lycamobile.co.uk/ucu…GB/
15GB for £3.50/month - lycamobile.co.uk/ucu…GB/
20GB for £4.90/month - lycamobile.co.uk/ucu…GB/
20GB for £5/month - lycamobile.co.uk/ucu…-4/
30GB for £5.90/month - lycamobile.co.uk/ucu…GB/
50GB for £7.90/month - lycamobile.co.uk/ucu…GB/
100GB for £10/month - lycamobile.co.uk/ucu…GB/
100GB for £10/month - lycamobile.co.uk/ucu…-5/
Unlimited for £18/month - lycamobile.co.uk/ucu…ed/
3GB for 1p/month - lycamobile.co.uk/ucu…GB/
4GB for 5p/month - lycamobile.co.uk/ucu…-1/
5GB for 80p/month - lycamobile.co.uk/ucu…GB/
6GB for 85p/month - lycamobile.co.uk/ucu…-2/
15GB for 94p/month - lycamobile.co.uk/ucu…-3/
10GB for £2.50/month - lycamobile.co.uk/ucu…GB/
15GB for £3.50/month - lycamobile.co.uk/ucu…GB/
20GB for £4.90/month - lycamobile.co.uk/ucu…GB/
20GB for £5/month - lycamobile.co.uk/ucu…-4/
30GB for £5.90/month - lycamobile.co.uk/ucu…GB/
50GB for £7.90/month - lycamobile.co.uk/ucu…GB/
100GB for £10/month - lycamobile.co.uk/ucu…GB/
100GB for £10/month - lycamobile.co.uk/ucu…-5/
Unlimited for £18/month - lycamobile.co.uk/ucu…ed/
3GB for 1p/month - lycamobile.co.uk/ucu…GB/
4GB for 5p/month - lycamobile.co.uk/ucu…-1/
5GB for 80p/month - lycamobile.co.uk/ucu…GB/
6GB for 85p/month - lycamobile.co.uk/ucu…-2/
15GB for 94p/month - lycamobile.co.uk/ucu…-3/
10GB for £2.50/month - lycamobile.co.uk/ucu…GB/
15GB for £3.50/month - lycamobile.co.uk/ucu…GB/
20GB for £4.90/month - lycamobile.co.uk/ucu…GB/
20GB for £5/month - lycamobile.co.uk/ucu…-4/
30GB for £5.90/month - lycamobile.co.uk/ucu…GB/
50GB for £7.90/month - lycamobile.co.uk/ucu…GB/
100GB for £10/month - lycamobile.co.uk/ucu…GB/
100GB for £10/month - lycamobile.co.uk/ucu…-5/
Unlimited for £18/month - lycamobile.co.uk/ucu…ed/