Strawberries

We have two strawberry patches here, one in the greenhouse and one in the raised bed by the dyke. Not sure what variety they are but the one's near the dyke were flowering and producing fruit when we moved here (mid to late June). Birds were eating the ones near the dyke so we netted them but since then there have been loads of runners but no flowers or fruit. I understand that to increase the yield runners need to be detached from the plants, but now we've left it so long I'm not sure which are the offspring and which are the parent plants. I guess I'll need to look a little closer. They may just be a Junebearing variety but I could be wrong. I remember when I was a kid that they used to produce bumper harvests from early summer through to the first frosts. I'm going to consult my horticulture guru, my Aunt, for some more information on this as the web and my gardening books seem to be thin on information of this kind.