My parents have decided that they want just rosebushes in their front garden - northfacing, two small lawns with borders round, typical double-fronted thirties bungalow - and as I do all their gardening it's down to me. So, what are the best sort to buy? I've seen a David Austin catalogue, are they really the only sort to get now? My rose knowlege was acquired in the 1970's and I suspect I'm a bit out of date. Planting and care I can do, it's the initial choice I'd like advice on, please.