The restaurant group, which is reported to have an annual turnover of £20 million and operates in over 100 locations throughout the UK, began trading in January 2008.
The new venues, which are due to open in September, promise to offer "a contemporary edge to the iconic Brutalist venue" and so encourage more people to visit The Barbican.
The agreement comes after an already successful partnership between the "world's third largest single sporting event" and RTH, following its delivery of the award-winning official travel and hospitali
Seafish is particularly interested in applications for grants that cover seafood marketing and consumer communication, or that promote the nutritional benefits of seafood.
In response to a recent survey carried out by Springboard, one of the 'hot topics' that chefs want to learn about is how to reduce the amount of salt they use, without compromising taste.