Posted: 28/10/2015 at 19:50
OMG Eggy, 20 miler 3 days before a half PB! I was worrying about 20 in the week before Silverstone but figured that'd give a longer taper to get the miles out of my legs for Paris. A shorter fast half is less taxing on the legs than a marathon pace 20 miles (again I'd considered doing the 20 at MP+30s to compensate). They do say taper should be less mileage with increased intensity ... I would have thought less likely to get injury at Half marathon pace compared to 3k track pace albeit a much shorter distance (and hence the need to warm up properly)
I guess there's no right or wrong answer. Quite a few people do Silverstone in the lead up to London (which is 3 weeks later than Paris this year).
I'm giving it a try this year and as Paris will be my 10th marathon I'll be able to see if it impacted negatively or positively.