We have had this plant for over 10 years, suddenly the plant has red leaves and a centre part- as seen in the picture below.
Please can some tell me what plant this is and what is happening to it?
Certified GKH Gardening Expert
This is a type of Bromeliad known as 'Pinguin'. It's official name is Bromelia pinguin.
This growth in the center is the "flower" that you are seeing. Usually it means that the main plant is nearing the end of its life, but it will grow offsets to replace it.
This article will give you information on the care of Bromeliads in general: https://www.gardeningknowhow.com/houseplants/bromeliad/growing-bromeliad-plants.htm