Take an exclusive first look around the world's biggest LEGO store in London's Leicester Square

The new LEGO store's biggest build is a 637,902 brick tube train that you can have your picture taken in.

LEGO really hammers home the London theme, with a number of tube stops dotted around the store.

One of the coolest parts of the store is the build-a-mini-figure stations that are filled with thousands of parts.

You can customise your mini figures however you want them.

Toys don't have to be basic, and these animated statues guide you round the store.

They've all got a stereotypically British look.

The British theme continues throughout: you don't get more British than a picnic and a Mini.

Even the tube map has been recreated in bricks.

Don't want to build your own? Fine, you can play Roulette with your mini figure selections.

We don't remember this from history, but it turns out Shakespeare used to ride the tube.

The pick & build wall is one of the coolest parts of the store.

You can fill pick & mix style cups, just with LEGO bricks instead of sweets.

There are even stations where you can just go in for a play.

Each of the big builds tell you how much work, and how many bricks, have gone into them.

A whole London cityscape takes up one wall, made, of course, entirely out of LEGO bricks.

Even the shop's lighting looks like massive LEGO bricks.

Brickly the Dragon snakes his way through the store.

It's not just LEGO bricks and kits you can buy, there's all manner of LEGO-inspired stuff too.