The simulation of atmospheric dispersion in low wind speed conditions (LW) is still recognised as a challenge for modellers.
The presence of multiple chronic conditions is increasingly recognised as a challenge in the medical management of patients with chronic diseases including diabetes, heart disease, obesity and arthritis.
"We recognise it's a challenge and we need to work for consistency of customer service".
Even though she says "we have always worked very well together", Hillier adds that "he and I and everyone would recognise it is a challenge in five years" to propel Corbyn into Downing Street.
"There is a lot of pressure on the rich countries, they recognise there is a challenge, but they are keeping their eyes closed, I don't think that will work anymore, they have to deliver," he said.
"However, as a service we recognise the challenge of effectively capturing and responding to the changing demands from complex public protection issues, fraud and cybercrime and the breakdown of these figures in future reports will be extremely helpful".
But, while I recognise the challenge, and that CEOs as a group indicate that we have hit a plateau, there is reason to be optimistic.
Jonny Forsyth, global drinks analyst at the market analysts Mintel, said it was no surprise that Beam Suntory had bought Sipsmith as the major spirits producers recognised they faced a challenge from fast-growing craft brands.
It is therefore vital that we recognise the challenge that this represents to us as a church, particularly given that as the established church we are called to minister and serve the whole nation," she said.
"Everyone from myself to leaders of local authorities, teachers, school governors - everyone needs to take a good long look in the mirror and recognise the challenge is for them as well as the people around them".
