Yesterday's Ride - Future Riding Advice

I'm fairly new to this road riding malarkey (bike is now 11 days old!) I've done a bit of mountain biking here and there before this though.
I've done about 250km in my first 11 days including 2 'long' rides these were.
Bank holiday Monday - 64km around the Chilterns took 1.25 litres of Isostar and no solids with me and felt awful at around 50km. Struggled through the last 15km.
Yesterday - 115km around the Chilterns, took 1.25litrs of isostar, loads of brioche and 2 flapjacks, averaged 25.5kmh for the first 85km then became very tired and had to tiptoe home at an average of about 18kmh.
I assume that I bought myself another 35km of riding with my food and that if I want to do more than 85km still feeling healthy then all I need to do is lots of 85km rides and build up stamina?
I've done about 250km in my first 11 days including 2 'long' rides these were.
Bank holiday Monday - 64km around the Chilterns took 1.25 litres of Isostar and no solids with me and felt awful at around 50km. Struggled through the last 15km.
Yesterday - 115km around the Chilterns, took 1.25litrs of isostar, loads of brioche and 2 flapjacks, averaged 25.5kmh for the first 85km then became very tired and had to tiptoe home at an average of about 18kmh.
I assume that I bought myself another 35km of riding with my food and that if I want to do more than 85km still feeling healthy then all I need to do is lots of 85km rides and build up stamina?
FCN 4-6 depending
2008 Rocky Mountain ETSX
2008 Ribble
2008 Rocky Mountain ETSX
2008 Ribble
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when are you eating?
How can I get more drink? I could put 2 x 750ml bottles on the bike and get up to 1.5litres, but to get any more than that I'd need to buy some on the way round? Is that the idea?
Brioche is lovely, not sure about gels, I've tried them before but didn't like the taste very much.
2008 Rocky Mountain ETSX
2008 Ribble
and you must pass a shop for water?
and you must pass a shop for water?
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750ml/hr is probably a better bet. Stop at a shop/garage and get a top up.
I guess I'll try and drink more, although I had to pee twice on sunday even drinking 1250ml. It was raining, so I didn't sweat very much.
Cheers for the help everyone.
2008 Rocky Mountain ETSX
2008 Ribble
3 jelly babies is the equivalent to one energy bar
We're all different I suppose, but a bit of fod as you go round has got to help.
70 miles without food would finish me off for sure.
2008 Rocky Mountain ETSX
2008 Ribble