I found Janina Opale Whitening Toothpaste on the bottom shelf of tooth products in a larger Boots store.
It comes in a cool little container and has a pump dispenser.

Unfortunately it is quite pricey. There is a Janina Opale Diamond, which is a stronger version of this toothpaste, and it is more expensive.

Janina helps prevent decay, controls plaque, and provides long lasting gum protection.

It's clinically proven non-abrasive formula helps to control bad breath while whitening teeth safely.

The toothpaste contains 0.1% Hydrogen Peroxide and fruit enzymes which help whiten teeth.

I noticed dramatic stain removal within just one week.

The instructions say that the toothpaste needs to be used for 6 weeks before the whitening effect occurs. However, I didn't notice much of a whitening effect even after 6 weeks.

This toothpaste is the only one I have found that states to brush teeth for 3 minutes and then not to rinse but to leave the toothpaste on your teeth. This is fantastic advice and should be included with all toothpastes.

Janina also have a liquid toothpaste which contains all the same ingredients as the toothpaste, except the gel, so you can just spray it into your mouth, swish and swallow (only 3 swallows allowed per day).

What a great little product! It comes in a neat little container, perfect to fit in a pocket or small bag.

Other whitening toothpastes work by abrading the enamel off your teeth! Janina Whitening Toothpaste works by using a tiny amount of bleach 0.1% (legal limit) and boosting the effect through natural fruit enzymes.

I've been using it for just over a year now with excellent results. My teeth are healthier (so my dentist informs me) and definitely whiter.

According to Janina's website, Health Which? (the independent consumer magazine) awarded Janina with the highest rating for the quality of clinical research, and the BBC television programme, Health Watchdog acknowledged that Janina Tooth Whitening products were the only ones to contain ingredients with the ability to whiten teeth (as opposed to stain removal).

It has been a little hard to get hold of in the past as some stockits such as Boots seem to run out of stock or hide it on the bottom shelves or with cosmetics, but recently Janina have started to sell it on their own website direct.

The one problem I have with it is the price, I know the manufacturer states on their website that it costs more to make and you only need a pea sized amount on your brush, but I just can't help feeling impoverished after stocking-up.