Looking skywards from inside

Weather chilly first thing then sun and cloud. Took mum to hospital for her dialysis at lunchtime then went on into Southend. Did some shopping and went to top end of town. Don't come up here that much so decided to go into the plaza for coffee and cake. Whilst sitting there (eating a very nice sticky lemon cake) looked up and noticed the sun making shadows on the roof,quickly got camera out and this is result. Bit of a change for me. Hope this is allowed as I got told I couldn't take photos in another similar building. Anyone know whether there are rules on this? I wasn't taking people or business names.