On our latest visit to London, Smix asked could we visit the Aquarium. The huge SeaLife aquarium is located opposite parliament, just over the bridge beside the Shrek Adventure attraction and The London Eye.

Never pay full price for tickets! There are kids go free offers on Cadbury packs, and 2 for 1 deals online, but I found the absolute cheapest way to do it. Kellogg's have an adults go free offer, which you can get even on cereal bar packs in the Pound Shop. So with it you just pay the £21 price for a kid's ticket, and the adult ticket (£26) is free.

You can pre-buy a ticket online, but you have to choose a 15 minute time slot to arrive at. As we didn't know what time our train would get in from the airport, I decided to just buy our tickets when we showed up.

The website had warned there can be a long queue, but this was a busy Tuesday afternoon in August and we just had to queue for 15 minutes to pay and go in. We just presented our voucher cut out of the Kellogg's box on arrival.

To see exactly how it works and read the list of all the attractions over the whole UK that the voucher can be used with, visit the Kellogg's deal site. It also works for the Shrek Adventure which is beside the aquarium, and locally, Carrickfergus Castle.

The London SeaLife Aquarium itself is really just like a bigger version of our Portaferry Aquarium. It's just that on a bigger scale, and takes longer to walk round.

There are dozens of viewing tanks, more fish and species, but I'm glad we didn't pay more than £10.50 each because we had seen most of it all before. The only difference was it had a crocodile, and a pretty cool jellyfish exhibition. I liked the piranhas best.

Right beside the Aquarium is one of London's newest but best known attractions, The London Eye.

The giant Ferris wheel gives 360 views of the city as far as the eye can see. We went on it on Smix's first visit to London in Easter 2016. We both loved it.

It can be pricy, but if you have a valid rail ticket for the day you can get a 2 for 1 London Eye discount voucher. Simply print it at home before you travel.

The ride lasts about 45 minutes, and is well worth the price. If you are cautious of heights don't worry, the pods are enclosed and solid, no wobbling, and quite large and spacious. There is a place to sit in the centre of each, and iPads with facts about the views you can see as you rise and fall.

I've heard that the view at night is something special, and might make a return visit to the London Eye on another trip to see the city at night.