Which transformer for Ring Video Doorbell Wired (UK)?

I've bought a Ring Video Doorbell Wired and despite my house being only 15 years old, the transformer for my current doorbell is only 6VA, 6V, 50HZ. The Ring doorbell requires 8-24VAC. I've bought a Ring Chime for the audio - I'll use this and the Amazon Echo devices I have around the house, I am happy to not use the current bell. Will I just need to replace my transformer? Is it just a case of turning off the power to it, taking out the current one and fitting a new one? Here is a [picture of my doorbell](https://1drv.ms/u/s!Ap6bIfBcKpuso5oyhx1f4LqOsYARgQ?e=ytl4dr). I've marked in green what I think is the transformer and in red what I think is the bell... Any recommendation as to which transformer I should get? Is this one okay? https://www.amazon.co.uk/Navaris-Door-Bell-Transformer-12V/dp/B07J2NWYC4/ref=sr_1_5?dchild=1&keywords=transformer+ring&qid=1624144124&sr=8-5